TheRashidun army (Arabic:جيش الراشدين) was the core of theRashidun Caliphate's armed forces during theearly Muslim conquests in the 7th century. The army is reported to have maintained a high level of discipline, strategic prowess and organization, granting them successive victories in their various campaigns.^[1]

In its time, the Rashidun army was a very powerful and effective force. The three most successful generals of the army wereKhalid ibn al-Walid, whoconquered Persian Mesopotamia and theRoman Levant,Abu Ubaidah ibn al-Jarrah, who also conquered parts of the Roman Levant, andAmr ibn al-As, whoconquered Roman Egypt. The army was a key component in the Rashidun Caliphate's territorial expansion and served as a medium for the early spread ofIslam into the territories it conquered.^[2]

According to Tarikh at Tabari, the nucleus of the early caliphate forces were formed from the Green Division (al-Katibah al-Khadra), a unit that consisted of early converts fromMuhajirun andAnsar that marched on toconquer Mecca.^[3]

Upon Muhammad's death, the Muslim community was unprepared for the loss of its leader and many experienced a profound shock. Umar was particularly affected, instead declaring that Muhammad had gone to consult with God and would soon return, threatening anyone who would say that Muhammad was dead.^[4] Abu Bakr, having returned to Medina,^[5] calmed Umar by showing him Muhammad's body, convincing him of his death.^[6] He then addressed those who had gathered at the mosque, saying, "If anyone worships Muhammad, Muhammad is dead. If anyone worships God, God is alive, immortal", thus putting an end to any idolising impulse in the population. He then concluded with a verse from theQuran: "Muhammad is no more than an apostle, and many apostles have passed away before him."^{[4][Quran 3:144]}

Troubles emerged soon after Abu Bakr's succession, with several Arab tribes launching revolts, threatening the unity and stability of the new community and state. These insurgencies and the caliphate's responses to them are collectively referred to as theRidda wars ("Wars of Apostasy").^[7]

The opposition movements came in two forms. One type challenged the political power of the nascent caliphate as well as the religious authority of Islam with the acclamation of rival ideologies, headed by political leaders who claimed the mantle of prophethood in the manner that Muhammad had done. These rebellions include:

• that of theBanu Asad ibn Khuzaymah headed byTulayha ibn Khuwaylid
• that of theBanu Hanifa headed byMusaylimah
• those from among theBanu Taghlib and theBani Tamim headed bySajah
• that of theAl-Ansi headed byAl-Aswad Al-Ansi
• Omani rebels led by Laqeet bin Malik

These leaders are all denounced in Islamic histories as "false prophets".^[7]

The second form of opposition movement was more strictly political in character. Some of the revolts of this type took the form of tax rebellions inNajd among tribes such as theBanu Fazara andBanu Tamim. Other dissenters, while initially allied with the Muslims, used Muhammad's death as an opportunity to attempt to restrict the growth of the new Islamic state. They include some of theRabīʿa inBahrayn, theAzd inOman, as well as among theKinda and Khawlan inYemen.^[7]

At their heart, the Ridda movements were challenges to the political and religious supremacy of the Islamic state. Through his success in suppressing the insurrections, Abu Bakr had in effect continued the political consolidation which had begun under Muhammad's leadership with relatively little interruption. By the wars' end, he had established Islamic hegemony over the entireArabian Peninsula.^[7]

After theTreaty of Hudaybiyyah in 628, Islamic tradition holds thatMuhammad sent many letters to the princes, kings, and chiefs of the various tribes and kingdoms of the time, exhorting them to convert to Islam and bow to the order of God. These letters were carried by ambassadors toPersia,Byzantium,Ethiopia,Egypt,Yemen, andHira (Iraq) on the same day.^[8] This assertion has been brought under scrutiny by some modern historians of Islam—notably Grimme and Caetani.^[9] Particularly in dispute is the assertion that Khosrau II received a letter from Muhammad, as the Sassanid court ceremony was notoriously intricate, and it is unlikely that a letter from what at the time was a minor regional power would have reached the hands of the Shahanshah.^[10]

With regards to Persia, Muslim histories further recount that at the beginning of the seventh year of migration, Muhammad appointed one of his officers, Abdullah Huzafah Sahmi Qarashi, to carry his letter toKhosrau II inviting him to convert:

In the name of God, the Beneficent, the Merciful.From Muhammad, the Messenger of God, to the great Kisra of Persia. Peace be upon him, who seeks truth and expresses belief in God and in His Prophet and testifies that there are no gods but one God whom has no partners, and who believes that Muhammad is His servant and Prophet. Under the Command of God, I invite you to Him. He has sent me for the guidance of all people so that I may warn them all of His wrath and may present the unbelievers with an ultimatum. Embrace Islam so that you may remain safe. And if you refuse to accept Islam, you will be responsible for the sins of the Magi.^[11]

There are differing accounts of the reaction ofKhosrau II.^[12]

By span from the ascensions of Abu Bakar as caliph until his death, the Rashidun Caliphate expanded steadily; within the span of 24 years, a vast territory was conquered comprising Mesopotamia, the Levant, parts of Anatolia, and most of the Sasanian Empire.

Arab Muslims first attacked Sassanid territory in 633, whenKhalid ibn al-Walid invadedMesopotamia (then known as the Sassanid province ofAsōristān; roughly corresponding to modern-dayIraq), which was the political and economic centre of the Sassanid state.^[13]

Abu Bakr was aware of Umar's power and ability to succeed him. His was perhaps one of the smoothest transitions of power from one authority to another in the Muslim lands.^[14]Before his death, Abu Bakr calledUthman to write his will in which he declared Umar his successor. In his will he instructed Umar to continue the conquests on theIraqi andSyrian fronts.^{[citation needed]}

Following the transfer of Khalid to the Byzantine front in theLevant, the Muslims eventually lost their holdings to Sassanid counterattacks. The second Muslim invasion began in 636, underSa'd ibn Abi Waqqas, when a key victory at theBattle of al-Qadisiyyah led to the permanent end of Sassanid control west of modern-dayIran. For the next six years, theZagros Mountains, a natural barrier, marked the border between the Rashidun Caliphate and the Sassanid Empire. In 642, Umar ordered a full-scale invasion of Persia by the Rashidun army, which led to the complete conquest of the Sassanid Empire by 651. Directing fromMedina, a few thousand kilometres away, Umar's quick conquest of Persia in a series of well-coordinated, multi-pronged attacks became his greatest triumph, contributing to his reputation as a great military and political strategist.^{[citation needed]}

The military conquests were partially terminated between 638 and 639 during the years of great famine in Arabia and plague in theLevant. During his reign the Levant, Egypt,Cyrenaica,Tripolitania,Fezzan, easternAnatolia, almost the whole of theSassanid Persian Empire includingBactria, Persia, Azerbaijan, Armenia,Caucasus andMakran were annexed to the Rashidun Caliphate. Prior to his death in 644, Umar had ceased all military expeditions apparently to consolidate his rule in recently conqueredRoman Egypt and the newly conquered Sassanid Empire (642–644). At his death in November 644, his rule extended from present dayLibya in the west to theIndus river in the east and theOxus river in the north.^[15]

Historians estimate more than 4,050 cities were conquered during the reign of Umar.^[15]

In 644, prior to the complete annexation of Persia by the Arab Muslims,Umar was assassinated byAbu Lu'lu'a Firuz, a Persian craftsman who was captured in battle and brought to Arabia as a slave.

Uthman ibn Affan, the thirdcaliph, was chosen by a committee inMedina, in northwesternArabia, inAH 23 (643/644). The second caliph,Umar ibn al-Khattab, was stabbed byAbu Lu'lu'a Firuz, aPersian slave.^[16] On his deathbed, Umar tasked a committee of six with choosing the next caliph among themselves.^[17] These six men from theQuraysh, all earlycompanions of theIslamic prophetMuhammad, were

• Ali ibn Abi Talib
• Abd al-Rahman ibn Awf
• Sa'd ibn Abi Waqqas
• Uthman ibn Affan
• Zubayr ibn al-Awwam
• Talhah ibn Ubaydullah

Where they unanimously selected Uthman as the successor. During his rule, Uthman's military style was less centralised as he delegated much military authority to his trusted kinsmen—e.g.,Abdullah ibn Aamir,Muawiyah I andAbdullāh ibn Sa'ad ibn Abī as-Sarâḥ—unlikeUmar's more centralized policy. Consequently, this more independent policy allowed more expansion until Sindh, in modernPakistan, which had not been touched during the tenure of Umar.^[18]

Muawiyah I had been appointed the governor of Syria byUmar in 639 to stop Byzantine harassment from the sea during theArab-Byzantine Wars. He succeeded his elder brotherYazid ibn Abi Sufyan, who died in a plague, along withAbu Ubaidah ibn al-Jarrah. Now under Uthman's rule in 649, Muawiyah was allowed to establish a navy, manned byMonophysitic Christians,Copts, andJacobite Syrian Christian sailors and Muslim troops, which defeated the Byzantine navy at theBattle of the Masts in 655, opening up the Mediterranean.^{[19][20][21][22][23]}

InHijri year 31 (c. 651), Uthman sentAbdullah ibn Zubayr andAbdullah ibn Saad toreconquer the Maghreb, where he met the army ofGregory the Patrician,Exarch of Africa and relative ofHeraclius, which is recorded to have numbered between 120,000 or 200,000 soldiers.^[24] The opposing forces clashed at Sabuthilag (or Sufetula), which became the name ofthis battle. Records from al-Bidayah wal Nihayah state that Abdullah's troops were completely surrounded by Gregory's army. However, Abdullah ibn Zubayr spotted Gregory in his chariot and asked Abdullah ibn Sa'd to lead a small detachment to intercept him. The interception was successful, and Gregory was slain by Zubayr's ambush party. Consequently, the morale of Byzantine army crumbled and soon they were routed.^[24]

Some Muslim sources claim that after the conquest of northern Africa was completed byMuhammad ibn Jarir al-Tabari,^[25] Abdullah ibn Sa'd continued toSpain. Spain had first been invaded some sixty years earlier during the caliphate of Uthman. Other prominent Muslimhistorians, likeIbn Kathir,^[26] have quoted the same narration. In the description of this campaign, two of Abdullah ibn Saad's generals, Abdullah ibn Nafiah ibn Husain, and Abdullah ibn Nafi' ibn Abdul Qais, were ordered to invade the coastal areas of Spain bysea, aided by a Berber force. They succeeded in conquering the coastal areas of Al-Andalus. It is not known where the Muslim force landed, what resistance they met, and what parts of Spain they actually conquered. However, it is clear that the Muslims did conquer some portions of Spain during the caliphate of Uthman, presumably establishing colonies on its coast. On this occasion, Uthman is reported to have addressed a letter to the invading force:

Constantinople will be conquered from the side ofAl-Andalus. Thus, if you conquer it, you will have the honor of taking the first step towards the conquest of Constantinople. You will have your reward in this behalf both in this world and the next.

Although raids by Berbers and Muslims were conducted against the Visigothic Kingdom in Spain during the late 7th century, there is no evidence that Spain was invaded nor that parts of it were conquered or settled by Muslims prior to the 711 campaign by Tariq.

Abdullah ibn Saad also achieved success in the Caliphate's first decisive naval battle against theByzantine Empire, theBattle of the Masts.^[27]

To the east,Ahnaf ibn Qais, chief ofBanu Tamim and a veteran commander who conqueredShustar earlier, launched a series of further military expansions byfurther mauling Yazdegerd III near theOxus River inTurkmenistan^[28][29] and later crushing a military coalition ofSassanid loyalists and theHephthalite Empire in theSiege of Herat.^[28] Later, the governor ofBasra,Abdullah ibn Aamir also led a number of successful campaigns, ranging from the suppression of revolts in Fars, Kerman, Sistan, and Khorasan, to the opening of new fronts for conquest inTransoxiana andAfghanistan.^[30]

In the next year, 652 AD, Futh Al-Buldan of Baladhuri writes thatBalochistan was re-conquered during the campaign against the revolt in Kermān, under the command of Majasha ibn Mas'ud. It was the first time that western Balochistan had come directly under the laws of the Caliphate and it paid an agricultural tribute.^[31][32]

The military campaigns under Uthman's rule were generally successful. Regarding the fate of their adversaries, unlike the Sasanian Persians, the Byzantines, after losing Syria, retreated back to Anatolia. As a result, they also lost Egypt to the invading Rashidun army, although the civil wars among the Muslims halted the war of conquest for many years, and this gave time for the Byzantine Empire to recover.

After Uthman's assassination, Ali was recognized as caliph in Medina, though his support stemmed from the Ansar and the Iraqis, while the bulk of the Quraysh was wary of his rule.^[33][34] The first challenge to his authority came from the Qurayshite leaders al-Zubayr and Talha. Backed by one of Muhammad's wives,A'isha, they attempted to rally support against Ali among the troops of Basra, prompting the caliph to leave for Iraq's other garrison town, Kufa, where he could better confront his challengers.^[35] Ali defeated them at theBattle of the Camel, in which al-Zubayr and Talha were slain and A'isha consequently entered self-imposed seclusion.^[35][36] Ali's sovereignty was thereafter recognized in Basra and Egypt and he established Kufa as the Caliphate's new capital.^[36]

Although Ali was able to replace Uthman's governors in Egypt and Iraq with relative ease, Mu'awiya had developed a solid power-base and an effective military against the Byzantines from the Arab tribes of Syria.^[35] Mu'awiya did not claim the caliphate but was determined to retain control of Syria and opposed Ali in the name of avenging his kinsman Uthman, accusing the caliph of culpability in his death.^[37][38][39] Ali and Mu'awiya fought to a stalemate at theBattle of Siffin in early 657. Ali agreed to settle the matter with Mu'awiya by arbitration.^[40] The decision to arbitrate fundamentally weakened Ali's political position as he was forced to negotiate with Mu'awiya on equal terms, while it drove a significant number of his supporters, who became known as theKharijites, to revolt.^[41] Ali's coalition steadily disintegrated and many Iraqi tribal nobles secretly defected to Mu'awiya, while the latter's allyAmr ibn al-As ousted Ali's governor from Egypt in July 658.^[40][42] Ali was assassinated by a Kharijite in January 661.^[43] His sonHasan succeeded him but abdicated in return for compensation upon Mu'awiya's arrival to Iraq with his Syrian army in the summer.^[40] At that point, Mu'awiya entered Kufa and received the allegiance of the Iraqis.^[44]

Later Mu'awiya was formally recognized as caliph inJerusalem by his Syrian tribal allies, thus starting the long string ofUmayyad dynastic rulers.^[45]

The first requirement to join the Rashidun caliphate army was to be Muslim.^[46] Earlier caliphs such as Abu Bakar and Umar were even stricter in terms of army recruitment as they did not allow any ex-rebels inRidda Wars. According toClaude Cahen, this strict policy was maintained at least until theSiege of Babylon fortress in Egypt^{[Notes 1]}. However, other sources noted the eastern theater of conquest in Persia are more lenient for recruitment as the caliphate employed former rebels such asTulayha andAmr ibn Ma'adi Yakrib. Tulayha even played a significant role during a raid against the Persian army during Sa'd's campaign, which was codenamedYaum Armath(يوم أرماث or "The Day of Disorder") by early Muslim historians.^{[48][49][50][Notes 2]} The policy of not employing ex-rebels and apostates (Ahl ar Riddah according to Tabari) were retracted by 'Umar during his second half reign.^[52]

The standing infantry lines formed the majority of the Rashidun army.^[53] They would make repeated charges and withdrawals known askarr wa farr, using spears and swords combined with arrow volleys to weaken the enemies and wear them out. However, the main energy had to still be conserved for a counterattack, supported by a cavalry charge, that would make flanking or encircling movements.

Defensively, theMuslimspearman with their two and a half meter long spears would close ranks, forming a protective wall (Tabi'a) forarchers to continue their fire. This close formation stood its ground remarkably well in the first four days of defence in theBattle of Yarmouk.^[54]

Jandora noted the merit of individual skills, bravery, and discipline of Rashidun infantry as the main reason they won battle of Yarmouk. Jandora pointed out their quality to remain steadfast even against the onslaught of Byzantine cavalry charge,^[55] or even when facing the elephant corps of Sassanid.^[56]

Aside from Donner's report that each caliphate's soldiers possessed camels,^[57] Dr Lee Eysturlid noted theDiwan al Jund around 640 AD has recorded that each caliphate's soldiers already possessed horses.^[58] The camels mainly supplied fromAl-Rabadha andDiriyah.^[59][60]

Reconstructing the military equipment of early Muslim armies is problematic relative to contemporary neighbouring armies such as Byzantium's as the visual representation of the early caliphate armaments was very limited physical material and difficult to date.^[61] However, Nicolle theorized the Muslim army used hardened leather scale or lamellar armour produced in Yemen, Iraq and along the Persian Gulf coast. Mail armour was preferred and became more common later during the conquest of neighbouring empires, often being captured as part of thebooty. It was known asDir, and was opened part-way down the chest. To avoid rusting it was polished and stored in a mixture of dust and oil.^[62]

Mail shirts were recorded already used by the Arabs before the advent of Islam.^[63] During the Battle of Uhud, Jami'at Tirmidhi recordedZubayr ibn al-Awwam's testimony that Muhammad wearing two layers of mail coat.^[64][65] However, there is still not yet archaeological founding of Arabic armor in such time.^[63]David Nicolle are certain the prevalence of leather armour among Arabs since the pre-Islamic era, due to the fact that the leather was one of important commodities which made the Meccan traders rich, which correlated with the war between the Byzantine and Sassanian Empires during 6th century as there was increased demand for such military goods that Nicolle called“military leatherwork".^[66]

Muslim headgear included gilded helmets—both pointed and rounded—similar to that of the silver helmets of the Sassanid Empire. The rounded helmet, referred to as "Baidah" ("Egg"), was a standard early Byzantine type composed of two pieces. The pointed helmet was a segmented Central Asian type known as "Tarikah".Mail armour was commonly used to protect the face and neck, either as anaventail from the helmet or as a mail coif the way it had been used by Romano-Byzantine armies since the 5th century. The face was often half covered with the tail of a turban that also served as protection against the strong desert winds.^{[citation needed]}

Another type of helmet used by the Rashidun army were the Mighfars.^[67]

Sayf was a broad sword with a peculiar hooked pomel used by the Rashidun army.^[68] Early Arab chroniclers mentioned two types of swords:

• Saif Anith, which was made of iron
• Saif Fulath orMuzakka, which was made of steel material.^[68]

These broad swords came to Arabia throughYemen port during the pre-IslamicʿĀd andJurhum era^{[Notes 3]}. These Indian-made swords were forged fromwootz steel.^[69] Aside from Yemen, high-qualityIndian swords also introduced to pre-Islamic Arab through port ofUbulla,Persian Gulf.^[70] The Arabs in Medina during the time of Muhammad were able to manufacture Sayf swords independently.^[69] There are records that some nobles made their sword with silver materials, such as Muhammad's sword andZubayr ibn al-Awwam sword used which reported by fromAnas ibn Malik and Hisham are made of silver or contain inscription of silver material.^[71][72] However, there is no archeological trace that such sword found yet.^[71]

Curved saber orShamshir also existed during the early years of the caliphate.^[73] This type of saber allegedly belonged to Muhammad and is now in theTopkapi Museum.^[73] David Nicolle theorized that this type of saber is probably of central Asian,Avar orMagyar origin. Nicolle theorized it reached the early Muslim Arabs through the contact with Byzantium before the 6th century.^[73]

Large wooden orwickerworkshields were in use, but most shields were made of leather. For this purpose, the hides of camels and cows were used and it would be anointed, a practice since ancient Hebrew times. During the invasion of the Levant, Byzantine soldiers extensively used elephant-hide shields, which were probably captured and used by the Rashidun army.^{[citation needed]}

Long spears which were used by infantry were locally made with the reeds of the Persian Gulf coast. The reeds were similar to that of bamboo.^[74] These Arab blacksmiths manufactured infantry spears calledal-Ramh.^[75] There are two types of this spear:

• Arab blacksmiths used sharpened animal horns for the tip of the blade
• Usual iron which was sharpened and hammered first until it forms the blade.^[75]

During the Battle of Badr, Muhammad commanded his companions to use spears for middle-range combat. The raw material for making spears was available in Arabia.^[75]

The early caliphate army also used blunt weapon such asMace, which namedal-Dabbus.^[76] A round-headed,Persian style mace^[77]

Wahshi ibn Harb, was a renowned javelineer who fought for pagan Quraish during thebattle of Uhud and killedHamza ibn Abdul-Muttalib with a javelin.^[78] After his conversion to Islam, he fought for the caliphate during theBattle of Yamama and personally killed apostate leaderMusaylimah with a javelin throw.^[78]

Ibn al-Qayyim concludes that Caliph Umar put special emphasis regarding his soldiers to practice extensively archery as the caliph wanted to implement the archery tradition according to the teaching of Muhammad to the military of Rashidun.^[79] Rashidun archers were noted for their sharpshooting skill to aim at the eyes of the enemy, such as in theBattle of al Anbar, where the Rashidun archers shooting the eyes of Sassanid catapult engineer corps, blinding hundreds of engineers and left the siege engine unused during the battle.^[80]

Rashidun archers were typically precise and power shooters, akin to Byzantine archers in theBattle of Callinicum.^[56] This powerful style allowed Rashidun archers to easily overcomeSassanid archers who preferred the rapid, showeringPanjagan archery technique, as the former packed more punch and range than the latter during theMuslim conquest of Persia.^[56] Another particular case highlighted by Baladhuri regarding account from a grandson of the survivor of Sassanid Army who witnessed theBattle of Qadisiyya how the Sassanid arrows failed to pierce Rashidun armors or shields, while in return the arrows of Muslim archers able to penetratemail coats and doublecuirass of Sassanid warriors.^[81][56] The archers of Rashidun army also recorded for their accuracy, as they can aim the eyes of Sassanid horses with their arrows duringSiege of Ctesiphon.^[82]

James Hardy theorized based on his quote fromJohn Haldon andRomilly Jenkins, one of the decisive main factor for the Rashidun historical victory in battle of Yarmuk were due to their superb cavalry archers.^[83] While James Francis LePree, assistant professor for Medieval History at the City College of New York, wrote that the factor of "unquestionably great cavalry skill of the Arabs' horse archers" during the battle of Yarmuk.^[84]

According to an ancient arabic manuscript of archery, Bows used by people of Arabs were locally made in various parts of Arabia; the most typical were the Hijazi bows. There are three types of Hijazi bows:

• Qadib variant is basically made from single stave of wood
• Masnu'ah variant are composite bows designed from a stave or two staves divided lengthwise with four composite materials of wood, horn, glue, and sinew
• Mu'aqabbah variant are bows designed with horn of goats placed in the belly of the bow and sinew placed on the back of the bow.^[85]

Arabs were able to master the art ofBowery and use it so effectively to even matched the qualities of Byzantines and Persians made. The most famous place for manufacturing bows was Za s r in al-Sham. which became the name renowned Zed bows (al-Kanä t in al-Zas riyyah). The Muslims continued to improve the manufacturing of bows and were able at one point to manufacture sophisticated machines (al Ma'arrah, a large crossbow).^[76] According to Latham in his work,Saracen archery, Muslim archers of early era has two types of arrows. The first were shorter darts calledNabl andNushshab, which were shot using either a crossbow or a bow equipped with arrow guide, while the second type were longer arrows which were shot with standard handbows.^[86] The maximum useful range of the traditional Arabian bow was about 150 meters.^{[citation needed]}

Rashidun cavalry were highly regarded by the military rulers of earlyMedina, the theocracy and the Caliphates' successor states who gave the cavalry troopers got at least two portions of spoils and booty from the defeated enemies, while regular infantry only received only a single portion.^[87]

The core of the caliphate's mounted division was an elite unit which early Muslim historians namedTulai'a Mutaharrika (طليعة متحركة), or themobile guard.^[88] Initially, the nucleus of the mobile guard was formed from veterans of the cavalry corps under Khalid during the conquest of Iraq. They consisted half of the forces brought by Khalid from Iraq to Syria 4.000 soldiers out of 8.000 soldiers.^[88] This shock cavalry division played important roles to the victories inBattle of Chains,Battle of Walaja,Battle of Ajnadayn,Battle of Firaz,Battle of Maraj-al-Debaj,Siege of Damascus,Battle of Yarmouk,Battle of Hazir and theBattle of Iron Bridge against theByzantine and theSassanid.^[88] Later, the splinter of this cavalry division underAl-Qa'qa ibn Amr at-Tamimi also involved in theBattle of al-Qadisiyyah,Battle of Jalula, and theSecond siege of Emesa.^[88]

Modern historians and genealogists concluded that the stocks of early caliphate cavalry army thatconquered from the western Maghreb of Africa,Spain to theeast of Central Asia are drawn from the stock of fierceBedouinpastoralnomads who take pride of their well-guarded mares genealogy,^{[89][90][91][92]} and called themselves the "People of the lance".^{[Notes 4]}

Caliphate Arabian noble cavalry^{[Notes 5]} mostly rode the legendarypurebredArabian horse, by fact the quality breeding of horses were held so dearly by the early caliphates who integrated traditions of Islam with their military practice.^[94][95][96] The phenomenal speed, stamina,animal cognition, along with very well documented pedigrees quality even for modern era standard,^[97][98] caused the Rashidun leaders to initiate a formal programs to distinguish them from inferior hybrids with unknown pedigrees including horses recently captured from the defeated Byzantines and Persians.^[99] Long withstanding periods of Arabian nomadic society closeness with the horses also contributed to fertility of equestrian masters which produced best class horse breed in Arabia.^[100] This breed are known as ahot-blooded breed that are known for their competitiveness. Mounts quality was monitored carefully since the beginning of the caliphate. Ibn Hisham recorded in his chronicle the earliest mention of such effort were after theSiege series of Khaybar fotresses the Muslims acquired massive booties of horses. In response Muhammad personally instructed the separation between purebred Arabian and the hybrid-class steeds.^[101]

This was practiced on a larger scale during the reign of caliphUmar. The caliph instructedSalman Ibn Rabi'ah al-Bahili to establish systematic military program to maintain the quality of caliphate mounts. Salman enlisted most of the steeds within realm of caliphate to undergo such steps:

1. Recording number and quality of horses available
2. Differences between theArabian purebreed and the hybrid breeds was to be carefully noted.
3. Arabic structural Medical examination andHippiatrica on each horses in regular basis including isolation and quarantine of sick horses
4. Regular training between horses and their masters to achieve the disciplined communication between them
5. Collective response training of the horses done in general routine
6. Individual response training of the horses on advanced level
7. Endurance and temperament training to perform in crowded and noisy place.^[101]

At the end of the program, both riders and horses obligated to enlisted in formal competition sponsored byDiwan al-Jund which consisted into two category:

1. Racing competition to measure the speed and stamina of each hybrids
2. Acrobat competition to measure the ability of the horses for difficult maneuvers during war.^[99]

Additionally, the already established cavalry divisions were obliged to undertook simulated combat operation raids during the winter and summer seasons, known asTadrib al-Shawati wa al-Sawd'if, which were intended to maintain the quality of each cavalry forces, while also maintain the pressures towards the Byzantines, Persians, and other caliphate enemies while there is no major military campaign.^[99]

This profound tradition of breeding exaltation even became a basis for scholars of later era such as by Shafi'i jurist, Al-Mawardi, to establish the ruling of regular military share that the owner of noble purebreed Arabian (al‑khayl al‑ʿitāq) should be rewarded a share of booty three times of regular infantry soldiers, while owners of inferior mixed breeds received only twice infantry soldiers' share.^[94]

The technical training method of each horsemen in this cavalry was recorded inal-Fann al-Harbi In- Sadr al-Islam andTarikh Tabari:

1. Riding horses with saddles
2. Riding horses without saddles
3. Swordfighting without horses
4. Horse charging with stabbing weapons
5. Fighting with swords from the back of a moving horse
6. Archery
7. Mounted archery while the horse running
8. Close combat while changing their seat position on the back of moving horse, facing backwards^[102]

Arabian caliphate cavalry wearing heavy armors as according to Eduard Alofs, contrary to the popular beliefs, the Arabian, both the Rashidun cavalry or the cavalry ofGhassanid and theLakhmid kingdom were not lightly armored scout horsemen. In fact, classic chroniclers such asTabari,Procopius, and the Manual ofStrategikon implied that the Arabian cavalry during the 5th century onwards were well armored heavy mounted troopers, Arabians usually covered their armors with dull-colored coats to prevent the sunburn on their metallic armor caused by hot climate of desert climate.^[103] Such Arabian knights were namedMujaffafa by early historians, which according to Martin Hinds were technically "ArabianCataphracts" as they are fully armored both riders and horses".^[104]

The early caliphate armies generally neglected the use of stirrups despite long knowing of stirrups. al-Jahiz commented that the Arabs spurned double iron stirrups as it is viewed as a weakness, while also provided hindrance for skillful riders to maneuver during battles and can be a disadvantage if the rider falls but his legs are stuck in the stirrups.^[105]

Caliphate horsemen used the following weapons in battle:

• Mounted archery with flying gallop was practiced by the early caliphate regular Arab cavalry from Rashidun era onwards.^{[99][106][103]} Alof theorized "Mubarizun" elite division also used archery in close-combat duels for maximum arrow penetration against opponent armor.^[107]
• Caliphate horsemen also used thrownjavelins as their weapon.Zubayr ibn al-Awwam, a seasoned Muhajir and early convert, who almost always brought horses during battle,^[108] is recorded to have killed his opponents at least in two occasions during his life. He killed Quraish nobleman Ubaydah ibn Sa'id fromUmayyad clan during theBattle of Badr, who was wearing a full set of armor andAventail that protected his entire body and face. Zubayr hurled his javelin aiming at the unprotected eye of Ubaydah and killed him immediately.^[87] The second occasion is during theBattle of Khaybar, Zubayr fought in a duel against a Jewish noblemanYassir which Zubayr killed with a powerful javelin strike.^[87] Firsthand witnesses reported that Zubayr brandishing himself across the battlefield during theBattle of Hunayn while hung two javelins in his back.^[87]
• Early caliphate cavalry held theirlance overhead posture with both hands.^[103]

A select few apparatus of mounted soldiers who particularly skilled in duel using swords and various weapons were formed a commando unit called known asMubarizuns.^[105]

Their main task was charging with their horses until they find the enemy generals or field officers, in order to kidnap or slay them in close combat, so the enemy will lose their commanding figure amidst of battle.^[109]

Historical reconstructors likeMarcus Junkelmann has practiced inhistorical reenactment that mounted close combat specialists like Mubarizuns could fight effectively on top of their mounts even withoutstirrups.^[105] This is used by Alofs as an argument to debuff the majority historian beliefs that horsemen cannot fight effectively in close combat if they rode their horse without stirrups.^[105]

Aside from fighting with swords, lance, or mace, Mubarizuns also possessed a unique ability to use archery in close combat, where Alofs theorized that in mid range about five meters from the adversary, the duelists will exchange his lance with his bow and shoot the enemy from close range to achieve maximum penetration, while the duelist held the lance strapped between right leg and saddle.^[107]

Caliphate cavalry recruited fromAl-Mahra tribe were known for their military prowess and skilled horsemen that often won battles with minimal or no casualties at all, which Amr ibn al As in his own words praised them as "peoples who kill without being killed"^{[Notes 6]}. Amr was amazed by these proud warriors for their ruthless fighting skill and efficiency DuringMuslim conquest where they spearheaded Muslim army during theBattle of Heliopolis, theBattle of Nikiou, andSiege Alexandria.^[110] Their commanders, Abd al-sallam ibn Habira al-Mahri were entrusted by 'Amr ibn al-'As to lead the entire Muslim army during the Arab conquest of north Africa. Abd al-sallam defeated the Byzantine imperial army in Libya, and throughout these campaigns Al-Mahra were awarded much land in Africa as recognition of their bravery.^[110] When Amr established the town of Fustat, he further rewarded Al-Mahri members additional land in Fustat which then became known asKhittat Mahra or the Mahra quarter.^[110] This land was used by the Al-Mahra tribes as a garrison.^[110]

During the turmoil ofSecond Fitna, more than 600 Mahranites were sent to North Africa to fight Byzantines and the Berber revolts.^[110]

The 8th century chroniclerAl-Jahiz noted the ferociousness ofKharijites horsemen, who spent parts of their early career inKufa as Rashidun garrison troops during theMuslim conquest of Persia before their rebellion against the caliphate.^[74] Al-Jahiz pointed out Kharijites steeds' speed could not intercepted by most rival cavalrymen in the medieval era, save for theTurkishMamluks.^[111] Notable seditionist warriors includedAbd Allah ibn Wahb al-Rasibi fromBajila tribe, who participated in the early conquests of Persia under Sa'd ibn abi Waqqas.^[112]

Al-Jahiz also added that the Kharijites were feared for their cavalry charge with their lances which could break any defensive line, and almost never lose when pitted against an equal number of opponents.^[111] Dr. Adam Ali MA, PhD. postulated that Al-Jahiz assessment of the quality Kharijites quality are synonymous with the regular Arab cavalry as general in term of speed andcharging maneuver.^[111] Their common ground with the caliphate military was even highlighted further by Professor Jeffrey Kenney, who said the early Kharijites existed in the time of Muhammad, in the form of figure named Dhu'l Khuwaisira at-Tamim,^[113] one ofBanu Tamim chieftain who appeared after theBattle of Hunayn who protested the war spoils distribution.^[114] In fact, ʿAbd al-Malik ibn Ḥabīb, a jurist and historian in the 9th century described theBerber Kharijites as a mirror match which resembles the Arabic caliphate martial tradition, except the loyalty to authority.^[115]

Ibn Nujaym al-Hanafi,Hanafi scholar said about Kharijites:"... kharijites are a folk possessing strength and zealotry, who revolt against the government due to a self-styled interpretation. They believe that government is upon falsehood, disbelief or disobedience that necessitates it being fought against, and they declare lawful the blood and wealth of the Muslims...”.^[116]

The Rashidun caliphate employed siege engines during their military campaigns.

Catapults, calledManjaniq, were evident in the history of the early caliphates. There is a long history of the Muslim armies from the battle of Khaybar. Muhammad breached a Jewish fortress with catapults. Later on,Urwah ibn Masʽud and Ghaylan ibn Salamah also reportedly travelled to Jurash, near Abha in southwestern of Asir region in order to learn how to construct various Manjaniq catapults and Dabbabah siege ram as the city of Jurash were known for its siege workshops industry.^[117] Christides highlighted the high learning curves of the Arabs during the early caliphates that they could catch up with more established civilizations such as Byzantine in making complex war machines such as theManjaniq catapult.^[118]

In the era of the caliphate,Catapults were used extensively in siege operations whenever the Muslim armies were expected to remain entrenched in one area for a long duration. Examples include Abu Ubaydah and Khalid'sbesieged Damascus, and furious artillery bombardments byAmr ibn al-As during thesecond siege of Alexandria which immediately caused the Christian garrison to surrender.^[119] Another record of such siege engines operations came fromAbdallah ibn Sa'd's attack on the capital of Makuria, where the catapult engine of Abdallah caused the main cathedral structure of Makuria to crumble, compelling KingQalidurut to agree to ratify a ceasefire agreement with the former.^[120] The forces of Sa'd ibn Abi Waqqas were also reported to able to quickly construct at least twenty siege engines during theSecond siege of Babylon, despite their relatively short stints in the area after the battle of Qadisiyyah.^[119] According to an obscure record fromSebeos, Mu'awiyah's fleet which was led byBisr ibn abi Artha'ah is also reported to carry unspecified artillery engines that can throw "balls ofGreek fire" within his ships during thesiege of Constantinople.^[121]

Siege towers with scaling ladders are namedal-Dabbdbah oral-dabr.^[46] These wooden towers moved on wheels and were several stories tall. They were driven up to the foot of the besieged fortification and then the walls were pierced with a battering ram.Archers guarded the ram and the soldiers who moved it.^[122]

Regular Muslim infantries also qualified on the battlefield construction and engineering such as when they were able to perfect the art of building pontoon bridges which allowed them to gain the upper hand during theBattle of the Bridge.^[123] Their expertise on this field also helped during the last phase of the Siege of Damascus, when the Muslim army built water rafts and dinghies to cross the trench.^[123]

During the Islamic conquest of Sassanid Persia (633-656), some 12,000 elitePersian soldiers converted to Islam and served later on during the invasion of the empire.^{[citation needed]} During the Muslim conquest ofRoman Syria (633-638), some 4,000Greek Byzantine soldiers under their commander Joachim (later Abdullah Joachim) converted to Islam and served as regular troops in the conquest of bothAnatolia andEgypt. During the conquest of Egypt (641-644),Coptic converts to Islam were recruited. During the conquest ofNorth Africa,Berber converts to Islam were recruited as regular troops, who later made the bulk of the Rashidun army and later the Umayyad army in Africa.^{[citation needed]}

Al-Abnāʾ was the descendants of Sasanian officers and soldiers of Persian andDaylam origins who intermarried with local Yemeni Arabs after they taken over Yemen from the Aksumite in theAksumite–Persian wars.^[124] The Abnas had been garrisoned in Sanaa and their surrounding Their leaders converted to Islam and were active in the early Muslim conquests. They were gradually absorbed into the local population.^[124] They are considered siege-warfare experts.^[111] However, al-Jahiz outlined al-Abna lacked medieval era standard mobility.^[111]

Notable figures hailed from al-Abna wasFayruz al-Daylami, hero of caliphate who defended Yemen for a decade during Apostate wars, andWahb ibn Munabbih, a prolificRāwī ofHadith who later became a judge during the rule of caliphUmar ibn Abd al-Aziz.

Some Greeks joined the caliphate army after they defected from Byzantine army. One example is Joachim, garrison commander ofAleppo, who defected along with his 4,000 garrison troops and fought loyally under the caliphate later.^[88]

As the conquest of Persia progressed, someSassanid gentry converted into Islam and joined theRashidun; these "Asawira"

Al-Jahiz outlined the quality of these Persians, which he identified asKhurasaniyyah, as powerful heavy cavalry with considerable frontal charge power, although they lacked speed.^[111] Al-Jahiz also claims the downside of the Persians was if their charge failed to break the enemy, they tended to give up fighting and were easily routed.^[111]

They continued service under the caliphate untilAbd al-Rahman ibn Muhammad ibn al-Ash'ath's rebellion. This heavily armored cavalry crushed by regular Arab cavalry led byAl-Hajjaj ibn Yusuf which possess more skill and discipline inBattle of Dayr al-Jamajim.^{[125][126][127][128][129]} As Hawting highlighted the different performance between caliphate cavalry and those of Abd al-Rahman al-Ash'ath's army including those ofPersian Asawir, that "between the discipline and organisation of the Umayyads and their largely Syrian support and the lack of these qualities among their opponents in spite of, or perhaps rather because of, the more righteous and religious flavour of the opposition" is a recurring pattern in the civil wars of the period.^[127]

As the territory of caliphatehas reached Sindh, there were reports that the localJats had converted to Islam and even entered the military service.^[130] A notable local named Ziyad al-Hindi recorded has been entered the service under caliph Ali.^[131]

Chronicler Faraj recorded in hisFann 'Idarat al-Ma'arakah fi al-Islam that for certain situations, caliph Umar allowed a distinct unit which had not yet embraced Islam to be enlisted for military service. Prior to theBattle of Buwaib, Umar allowedal-Muthanna ibn Haritha to recruit Arab members of banu Taghlib and banu Nimr who had not yet embraced Islam for his service.^[132]

Since the time of Muhammad, field medic roles were usually filled by wives or female relatives of the soldiers while during the period of Umar he extensively improved this role by changing it to make sure that every force being sent there had a team of medics, judges, and translators.^[46]

The Rashidun caliphate employed camels in various military roles since they respected the beasts' legendary endurance and were more numerous than horses in the Middle East, especially in dry areas. Extensive use of camels occurred during the initial campaigns of Muhammad,^[87] which continued onwards the existence of Rashidun caliphate and it successor states. The abundant availability of camel herds within caliphate enabled even infantries also mounted with camels during the caliphate military campaigns.^{[133][full citation needed]}

Al-Baghawi recorded an example that found from long narration of tradition, that a wealthy Arab soldier likeDhiraar ibn al-Azwar possessed 1,000 camels even before converting to Islam.^{[Notes 7]}

Furthermore, the development of Diwan al-Jund by caliph Umar ensured each caliphate soldiers possessed camels,^[57] despite their difficult tempers and expensive price. Both the camel riders and infantry of the Caliphate armies are known to have ridden camels during long-march campaigns.^[57][103]

Historians have generally agreed that the early caliphate's rapid conquests were facilitated by their large-scale utilization ofdromedaries.^[92][135]

Rashidun army camels also bore offspring while marching to the battle. Tabari, a firsthand witness of Rashidun vanguard commanderAqra' ibn Habis, recorded that before the Battle of Anbar, the camels belonging to his soldiers were about to gave birth. However, since the Aqra' would not halt the operation, he instructed his soldiers to carry the newborn camels on the rumps of adult camels.^[136]

According to classical Muslim sources, caliph Umar acquired some fertile land in Arabia which were deemed fit for large-scale camel breeding to be established asHima, government-reserved land property used aspasture to raise camels that were being prepared to be sent to the front line for Jihad conquests.^[137]

Early sources recorded that theHima of Rabadha and Diriyah produced 4,000 war camels annually during the reign of Umar, while during the reign of Uthman, bothHima lands further expanded until al-Rabadha Hima alone could produce 4,000 war camels.^[60]

At the time of Uthman death, there were said to be around 1,000 war camels already prepared in al-Rabadhah.^[60]

ModernIslamic studies researchers theorized institution ofHima by caliph Umar, was inspired by the earliestHima established in Medina during the time of Muhammad.^[59] Muhammad himself instructed that some of private property at the outskirts of Medina was transformed intoHima.^[138] Another reason the caliph Umar movedHima from Medina was the increasing military demand for camels for which the lands near Medina no longer sufficed.^[59]

David Nicolle also mentioned the use of distinct camel cavalry during the battle of Qadisiyyah.^[139] It is known that horses can be scared by the stench of camels.^[140][141]

Caliphate archers rode camels inside or outside battle, and only dismounted when they were taking position to shoot volleys.^[57][103]

According to John Walter Jandora in his Yarmouk reconstruction study, for the open-battle scenario, the abundance of camels brought by the army during their campaigns were used to form a line of camels positioned on the rear of Muslim battle lines, between the infantry lines and the camp perimeter which were positioned behind them,^[55] where reserve troops (al-Saqah), supplies and camp followers were located. Jandora argued it is used as a fail-safe, in case of breaches by enemy cavalry charges, which act as a deterrent that even stopped the powerful charge of theByzantine Cataphract due to the beasts' large frames and foul tempers.^[55][142]

Amr ibn al-As led a ruthless cavalry corps from tribes of Al-Mahra who were famous for their "invincible battle skills on top of their mounts", during the conquests of Egypt and north Africa^{[Notes 8]}. Al-Mahra tribes were experts in camelry and famed for their high-class Mehri camel breed which were renowned for their speed, agility and toughness.^[110]

During theBattle of al-Anbar, Khalid instructed his soldiers to slaughter many sickly camels and throw them into the trench dug by the Persian defenders in front of the wall of Anbar fortress. The heap of dead camels served as a bridge for Khalid cavalry to cross the trench and breach the fortress.^{[Notes 9]}

Similar to the infantry, the archer corps of the Rashidun caliphate were mounted during their movements during their marches.^[57][103] The stamina and strength of camels along with their abundant availability across the caliphate realm by the army enabled their famous fast mass mobilization.^[139][144] Even the horsemen preferred riding camels during a march as they wanted to save their steed's energy for battles and raids.^[57][103]

Desperate caravaners are known to have consumed camels' urine and to have slaughtered them when their resources were exhausted.^[145]

Around 634, after the clash at theBattle of Firaz against intercepting Byzantine forces, caliph Abu Bakr immediately instructed Khalid to reinforce the contingents of Abu Ubaydah, Amr ibn al-As, and Yazid ibn Abi Sufyan which started to invade Syria. Khalid immediately started his nearly impossible journey with his elite forces after leaving Muthanna ibn Haritha as his deputy in Iraq and instructed his soldiers to make each camel drink as much as possible before they started the six-day nonstop march without resupply.^{[146][Notes 10]} In the end, Khalid managed to reach Suwa spring and immediately defeated the Byzantine garrison inArak, Syria,^[148] who were surprised by Khalid's force's sudden emergence from the desert.^[80]

According to Hugh Kennedy, historians across the ages assessed this daring journey with various expressions of amazement. Classical Muslim historians praised the marching force's perseverance as a miracle and work of god, while most western modern historians regard this as solely the genius of Khalid.^[149] It is Khalid, whose, inHugh Kennedy's opinion, imaginative thinking effected this legendary feat.^[149] The historianMoshe Gil calls the march "a feat which has no parallel" and a testament to "Khalid's qualities as an outstanding commander".,^[150] whileLaura Veccia Vaglieri and Patricia Crone^[151] dismissed the adventure of Khalid as never having happened as they thought it logically impossible.^[152] Nevertheless, military historian Richard G. Davis explained that Khalid imaginatively employed camel supply trains to make this journey possible.^[146] Those well hydrated camels that accompanied his journey were proven before in theBattle of Ullais for such a risky journey.^[144] Khalid resorted to slaughtering many camels for provisions for his desperate army.^[146]

When the army was on the march, it always halted on Fridays. When on march, the day's march was never allowed to be so long as to exhaust the troops. The stages were selected with reference to the availability of water and other provisions. The advance was led by an advance guard consisting of a regiment or more. Then came the main body of the army, and this was followed by the women and children and the baggage loaded on camels. At the end of the column moved the rear guard. On long marches the horses were led; but if there was any danger of enemy interference on the march, the horses were mounted, and the cavalry thus formed would act either as the advance guard or the rear guard or move wide on aflank, depending on the direction from which the greatest danger loomed.

When on march the army was divided into:

• Muqaddima (مقدمة) - "the vanguard"
• Qalb (قلب) - "the center"
• Al-khalf (الخلف) - "the rear"
• Al-mu'akhira (المؤخرة) - "the rear guard".^[46]

The army was organized on thedecimal system.^[46]

On the battlefield the army was divided into sections. These sections were:

• Qalb (قلب) - the center
• Maymana (ميمنه) - the right wing
• Maysara (ميسرة) - the left wing^[46]

Each section was under a commander and was at a distance of about 150 meters from the others. Every tribal unit had its leader called anarif. In such units, there were commanders for each 10, 100 and 1,000 men, the latter-most corresponding toregiments. The grouping of regiments to form larger forces was flexible, varying with the situation.Arifs were grouped and each group was under a commander calledamir al-ashar andamir al-ashars were under the command of a section commander, who were under the command of the commander in chief,amir al-jaysh.^[46]

Other components of the army were:

• Rijal (رجال) - infantry
• Fursan (فرسان) - cavalry
• Rumat (رماة) - archers
• Tali'ah (طليعة) - patrols, who monitored enemy movements

1. 'Rukban (ركبان) - camel corps
2. 'Nuhhab al-mu'an (نهّاب المؤن) - foraging parties, Rukban (ركبان)^{[citation needed]}

The general strategy of early Muslim cavalry was to utilize their speed to outpace their adversaries. Muslim generals such as Khalid ibn Walid and Sa'd ibn Abi Waqqas are known to have employed this advantage against both theSassanid army and the Byzantine army as the main drawback of the armies of Sassanid Persian Empire and theEastern Roman Empire was their lack of mobility.^[153]

Another remarkable strategy developed by Al-Muthanna and later followed by other Muslim generals was not moving far from the desert so long as there were opposing forces within striking distance of its rear. The idea was to fight the battles close to the desert, with safe escape routes open in case of defeat.^[154]

The tactics used by Iyad in his Mesopotamian campaign were similar to those employed by the Muslims inPalestine, though in Iyad's case the contemporary accounts reveal his specificmodus operandi, particularly in Raqqa.^[155] The operation to capture that city entailed positioning cavalry forces near its entrances, preventing its defenders and residents from leaving or rural refugees from entering.^[155] Concurrently, the remainder of Iyad's forces cleared the surrounding countryside of supplies and took captives.^[155] These dual tactics were employed in several other cities in al-Jazira.^[155] They proved effective in gaining surrenders from targeted cities running low on supplies and whose satellite villages were trapped by hostile troops.^[155]

Ubadah ibn al-Samit, another Rashidun commander, is also recorded to have developed his own distinct strategy which involved the use of cavalry during siege warfare. During a siege, Ubadah would dig a large hole, deep enough to hide a considerable number of horsemen near an enemy garrison, and hid his cavalry there during the night. When the sun rose and the enemy city opened their gates for the civilians in the morning, Ubadah and his hidden cavalry then emerged from the hole and stormed the gates as the unsuspecting enemy could not close the gate before Ubadah's horsemen entered. This strategy was used by Ubadah during theSiege of Laodicea^[156][157] andSiege of Alexandria.^[156]

It was one of the most highly developed departments of the army which proved helpful in most of the campaigns. Theespionage (جاسوسية) andintelligence services were first organised by Muslim generalKhalid ibn Walid during hiscampaign to Iraq.^[119] Later, when he was transferred to theSyrian front, he organized theespionage department there as well.^[158] As the term of military rulings during Rashidun caliphate were intertwined with Sharia ruling, the concept of espionage also became subject in jurisprudential term, as in the modern era,Islamic official committee of Saudi Arabia Scholars also used the practice of az-Zubayr as one of their source of fatawa, such as an act of government tospying any endangering act fromenemy of the state, such as criminal behavior, alleged terrorism, and other illegal conduct, were allowed in Islam jurisprudence.^[159] The committee based this ruling of espionage by legitimate government from the act of az-Zubayr for spyingBanu Qurayza for their alleged betrayal during the Battle of the Trench on the instruction of Muhammad.^[159]

During the tenure of Khalid ibn al-Walid in theMuslim conquest of Iraq, he formedUmmal, military units that act as his deputy personnel to govern, watch, and collectKharaj andJizya in the occupied areas, or as raiding parties in uncaptured cities or settlements.^[160] At one time, Khalid appointedDhiraar ibn al-Azwar,Al-Qa'qa' ibn Amr at-Tamimi,Dhiraar ibn al-Khattab,al-Muthanna ibn Haritha, Dhiraar ibn Muqrin, and Busr ibn Abi Ruhm asUmmal raiding force to raid Sib, a district located near the city ofQasr ibn Hubayrah and north ofHillah.^[160] These raiding detachment forces made repeated, casual raids until it was subdued.^[160]

The caliphs of Rashidun founded an administrative body which was based on military governorship, known asJund. Jund were garrisoned in a capital which became the military headquarters namedAmsar. Border military posts' fortifications of Jund were also established and namedRibat.

Baladhuri estimates that around 636 AD, the number of caliphate regular soldiers in Basra totalled 80.000.^{[Notes 11]}

CaliphUmar was the first ruler to organize the army state department in the name of Diwan al-Jund to oversee the needs of soldiers regarding equipment. This reform was introduced in 637 AD. A beginning was made with theQuraish and theAnsars and the system was gradually extended to the whole ofArabia and to Muslims of conquered lands. All adults who could be called to war were prepared, and a scale of salaries was fixed.^[99] All registered men were liable for military service. They were divided into two categories, namely:

1. Regular soldiers
2. Muslim civilians who could be enlisted for the compulsory call ofJihad in case of state emergency.^[99]

The pay was given in the beginning of the month ofMuharram.

The armies of the Caliphs were mostly paid in cash salaries. In contrast to many post-Roman polities in Europe, grants of land, or rights to collect taxes directly from the people within one's grant of land, were of only minor importance. A major consequence of this was that the army directly depended on the state for its subsistence which, in turn, meant that the military had to control the state apparatus.^[162]

Before the caliphate, the Caliphal guards or Haras and Shurta were volunteers yet consistent practice where at most around fifty persons were enlisted to guard Muhammad wherever he went. In Muhammad's era they were usually those earlyCompanions generally known for martial prowess such asTalhah ibn Ubaydillah,Sa'd ibn Mu'adh, Zubayr ibn al-Awwam,Sa'd ibn Ubadah,Muhammad ibn Maslamah, Sa'd ibn Abi Waqqas,Abu Ayyub al Ansari,Usayd ibn Hudayr,Miqdad ibn Aswad and others.^[163] However, these units were disbanded after theAsbabun Nuzul during theRaid on Dhu Amarr.^{[Quran 5:11][164]}

Although they seem similar and interchangeable in duty, Haras and Shurta were different. Shurta mainly guarded and policed important state sites, such asMasjid Nabawi Caliphate citadel, the capital district of the Emirate governor, or Sultanate palaces, while also patrolling around the city to maintain law and punish any violations. Meanwhile, Haras served as bodyguards, whether to Muhammad himself, Caliphs, Sultans, Governors, or Amirs.^[165]

They were also tasked to assist the regular forces in battle to repel enemy advances toward the capital.^[163] This role was recorded byIbn Kathir after therebellion break out across Arabia after the death of Muhammad, Abu Bakr immediately revived the organised elite guard unital-Ḥaras wa al-Shurṭa, which had earlier been disbanded by Muhammad after theRaid on Dhu Amarr. Abu Bakr raised these units again to defend Medina as a massive coalition of tribes had gathered around Medina while the main army of Medina had accompaniedUsama ibn Zayd to conquer the border of northern Arabia and Jordan.^[165] Veteran companions such asAli ibn Abi Talib,Talha ibn Ubayd Allah,Abd al-Rahman ibn Awf,Abdullah ibn Mas'ud andZubair ibn al-Awwam were appointed as commanders of these units before the battle.^[166] This unit defeated the huge rebel tribes gathering during thedefense of Medina, by only using transport camels as mounts, since warhorses and trained camels were brought by the main army led by Usama, who was still fighting the Ghassanid in the north.^[166]

After Abu Bakr, Haras and Shurta practice ofretinual bodyguards seems absent or minimal during the reign of Umar, Uthman, Ali, and Hasan.^[165][163] However, afterMu'awiyah ascension he revived this practice drastically after the bloody ends of Umar, Uthman, Ali, andHasan ibn Ali. Haras and Shurta broadened the role to not only guard caliph, but also Amirs or military governors which continued onwards of successive caliphates, both Umayyad andAbbasid, and their localized successor states.^[165] According to the tradition of ImamSuyuti, the first person to implement Shurta police forces on the governor level was Amr ibn al-'As.^[163]

Shurta bodyguard numbers varied from around 30-50 at the time of Muhammad, or 500-600 at the time of Mu'awiyah. For Umayyad governors such asKhalid al-Qasri even possessed 4,000 members or higher for later era^[163] which practically became private armies of each governor.

Shurta during Umayyad usually patrolled on horseback.^[163]Hajjaj ibn Yusuf prescribed that Shurta members must ride the best horses and forbade Shurta to ride inferior animals such as mules.^[163] The Shurta often wore heavy armor of Mujaffafa (scale armor) during their duty.^[163]

According to various early Muslim historians, aside from protecting the sovereign and capital, the Haras unit also acted as security police to maintain the safety of the city where they were assigned. During Umayyad rule they were armed with javelin-sized short spears calledHirba, a mace, along with whips and chains as disciplining weapon.^[165] They also usually carried Sayf long swords in order to immediately executes someone on the order of their superiors.^[163] The Shurta during the Umayyad period also carried a weapon calledKafr Kubat, a slingshot-type weapon^[163]

The basic principle in theQur'an for fighting is that other communities should be treated as one's own. Fighting is justified for legitimateself-defense, to aid other Muslims and after a violation of the terms of a treaty, but should be stopped if these circumstances cease to exist.^{[167][168][169][170]} During his life,Muhammad gave various injunctions to his forces and adopted practices toward theconduct of war. The most important of these were summarized by Muhammad's companion,Abu Bakr, in the form of ten rules for the Rashidun army:^[171]

Stop, O people, that I may give you ten rules for your guidance in the battlefield. Do not commit treachery or deviate from the right path. You must not mutilate dead bodies. Neither kill a child, nor a woman, nor an aged man. Bring no harm to the trees, nor burn them with fire, especially those which are fruitful. Slay not any of the enemy's flock, save for your food. You are likely to pass by people who have devoted their lives to monastic services; leave them alone.

These injunctions were honored by the secondcaliph,Umar, during whose reign (634–644) importantMuslim conquests took place.^[172] In addition, during theBattle of Siffin, the caliphAli stated that Islam does not permit Muslims to stop the supply of water to their enemy.^[173] In addition to theRashidun Caliphs,hadiths attributed to Muhammad himself suggest that he stated the following regarding theMuslim conquest of Egypt:^[174]

"You are going to enterEgypt, a land whereqirat (a money unit) is used. Be extremely good to them as they have with us close ties and marriage relationships."

"Be Righteous toAllah about the Copts."

The caliphate army also emphasised discipline. The fourth caliph,Ali, put an emphasis on the discipline of archers and cavalry, as he disliked unnecessary talks and noisiness during the motion of battle.^[103]

The major compendium codex of Shafiite scholars ruling,Kitab al-Umm, has mentioned regarding the duels of Zubayr, Ali, andMuhammad ibn Maslamah against Jewish champions during the siege of Khaybar fortresses as part ofTaharruf, ormilitary deception chapter based on Islamic law.^[175]

• Arab conquest of Armenia
• Byzantine-Arab Wars
• Fall of Sassanids
• Islamic conquest of Afghanistan
• Islamic conquest of Persia
• Mobile guard
• Muslim conquests
• Muslim conquest in the Indian subcontinent
• Muslim conquest of Egypt
• Muslim conquest of Syria
• Rashidun caliphs
• Rashidun Caliphate

• The Turks: The Medieval World’s Most Martial People;Dr. Adam Ali M.A. Phd.^[111]

• Recorded traditional oral narration of historical events during the early time of Islam ofUrwah ibn Zubayr, an historian during Rashidun era.
• Earliest records ofMaghazi (historical records regarding Islamic conquests) of Muhammad byTabi'in historianAban ibn Uthman
• Recorded narrations of Maghaziclassifications byIbn Shihab al-Zuhri
• historical manuscript compilations aboutHima (war-camel breeding grounds) (3rd AH) authored by Abu Ali al-Hajari
• Mu'jam M Ista'jam (5th AH), an early caliphate history about war camel breeding authored by Abu Ubaid al-Bakri
• Wafa' al-Wafa' bi Akhbar Dar al-Mustafa (6th AH), an early caliphate historical manuscript mentioningHima breeding grounds Al-Samhudi
• Musnad Ahmad ibn Hanbal, which contains many scarces of historical account regarding military activity during the time of Muhammad and four righteous guided caliphate
• Sahih Bukhari Chapter 57: Book of Jihad, regarding ethics and basics of warfare according to Islamic tradition
• Sahih Muslim Chapter 19: KITAB AL-JIHAD WA'L-SIYAR (The Book of Jihad And Expedition), regarding ethics and conduct during wartime
• Bulugh al-Maram Chapter 10. The book of Jihad. treatise regarding basis of military conducts and treatise attributed toShafiʽite scholarIbn Hajar al-Asqalani.
• Sīrat Rasūl Allāh (Biography of the prophet of Allah) byIbn Hisham
• Masabih al-Sunnah contained narrations of the peoples who lived during the Rashidun conquests, including those directly involved in the conquest. Authored byAl-Baghawi
• Al-Sirah al-Nabawiyyah (The Life of the Prophet)', an edited recension byIbn Isḥāq
• History of the Prophets and Kings (Arabic:تاريخ الرسل والملوكTārīkh al-Rusul wa al-Mulūk), more commonly known asTarikh al-Tabari (تاريخ الطبري) orTarikh-i Tabari orThe History of al-Tabari (Persian:تاریخ طبری)
• Historical excerpts fromAbu Bakr al-Zubaydi, scholar and historian from theCaliphate of Córdoba
• Kitāb al-Furūsiyya wa 'l-Bayṭara ("Book of Horsemanship and Hippiatry"), regarding horsemanship and proficiency in handling all types of weapons, and bravery, byIbn Akhī Ḥizām (ابن أخي حزام)
• Al-Furūsiyya (Equestrian martial exercise) of four basic principles of horsemanship, archery, cavalry charging, and swordsmanship, authored byIbn Qayyim al-Jawziyya
• Futuh al-Buldan, The Conquest of (the) countries, a work regarding early Islamic conquest 9th century historianAhmad Ibn Yahya al-Baladhuri of Abbasid-era Baghdad
• Futūḥ mișr wa akhbārahā (Arabic:فتح مصر و أخبارها, Conquest of Egypt and some account of it, i.e. of the country) authored byIbn Abd al-Hakam
• Kitāb al-Furūsiyya wa-al-Bayṭarah, regarding military tactics around cavalry, Hippiatry, and archery warfare
• Kitab al-Tarikh wa al-Maghazi (Arabic: كتاب التاريخ والمغازي, "Book of History and Campaigns") by al-Waqidi
• Kitāb aṭ-Tabaqāt al-Kabīr (transl. The Book of the Major Classes), eight-volume work contains the lives of Muhammad, his Companions and Helpers, including those who fought at the Battle of Badr as a special class, and of the following generation, the Followers, who received their traditions from the Companions, authored byIbn Sa'd
• Usd al-ghabah fi marifat al-Saḥabah (The Lions of the Forest and the knowledge about the Companions), biographies of Muhammad and 7,554 of hiscompanions, byAli ibn al-Athir
• TheStrategikon, a military handbook of the late 6th century, attributed to the EmperorMaurice
• Social commentary regarding military and social developments during the times of caliphates found in thebooks ofAl-Jahiz
• Arab archery, a translated classical treatise of traditional Arabic archery written by an unknown author
• A History of Heraclius, historical accounts regarding the events of mid to late 7th century with full biblical allegory, written bySebeos

• Military units and formations established in the 7th century
• 661 disestablishments
• Military units and formations of the medieval Islamic world
• Military history of the Rashidun Caliphate

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