The following is atimeline of theSyrian Civil War from January to April 2017. Information about aggregated casualty counts is found atCasualties of the Syrian Civil War.

• Syrian opposition halted peace negotiations inAstana,Kazakhstan, citing multiple government ceasefire violations.^[1]

• Syrian Army forces seize the Air Defense Battalion Base, near Hazrama, fromJaysh al-Islam militants in the EasternGhouta region of rural Damascus, during a counter-attack to the Islamist offensive.^[2]

Over 60 are killed and 50 are injured in theJanuary 2017 Azaz bombing.

• Syrian media and U.S.-based journalists report that a special operation was carried out by U.S. forces inDeir ez-Zor Governorate. The operation took place between Kabr village and Jazra town, and some ISIL fighters were captured.^[3][4]

• US airstrikes struck the formerSyrian Army Sheikh Suleiman military base in western Aleppo now used by Jabhat Fatah al-Sham and theNour al-Din al-Zenki Movement, killing more than 76 al-Qaeda fighters, including Abu Hasan al-Taftanaz, a senior leader.^[5] More than 150 AQ members were killed by US airstrikes in the first three weeks of January.^[6]

• According to government officials,Hay'at Tahrir al-Sham rebels were beginning to negotiate their surrender at two eastern Damascus suburbs.^[7]

The Syrian Army took full control ofWadi Barada. Maintenance workers were sent by the government to fix the Al-Fijeh Springs thus restoring the water supply to 5 million people who reside in Greater Damascus.^[8][9]

• Israel cancels a plan to accept 100 Syrian child refugees due to opposition within its government.^[10][11]

• TheTurkish Free Syrian Army forces, as a part ofOperation Euphrates Shield, tookfull control of the city ofal-Bab.^[12] SAA and SDF forces seize other towns from ISIS control in the Aleppo countryside.^[13][14][15]

• Establishment of theArima buffer zone along part of the border between the SDF-alignedManbij Military Council and theFree Syrian Army (FSA) forces within theTurkish occupied zone.^[16][17]

• The Syrian Army with Russian support recaptures Palmyra from ISIS forces. ISIL seized the city from government forces in early December 2016 during a sudden offensive.^[18][19]

• U.S. Marine units began to deploy at Northern Syria District of Raqqa Governorate in as part of operations to help SDF forces take control of Raqqa from ISIL.^[20]

• In aborder incident, the Syrian Arab Army launched anti-aircraft interceptor missiles, which targetedIsraeli jets on the Israeli-controlled side of the Golan Heights prompting Israeli anti-missile response, as Syrian Army accused Israel of allegedly striking targets on Syrian territories near Palmyra.^[21] Syrian Army claimed it intercepted 2 Israeli jets, while shooting down one and causing damage to the other, while Israel denied. Remains of the anti-aircraft missiles fell in North Jordan.^[22]

Tahrir al-Sham launched an offensive on Hama Governorate with the aim of reaching Hama city.^[23] other Rebel offensives are countered by the SAA forces at Jobar (Damascus).^[24]

Hundreds of SDF soldiers are airlifted by United States across the Euphrates to begin their advance to captureTabqa Dam and cut off ISIS reinforcements fromRaqqa.^[25]

• The government of the Islamic Republic of Iran and Qatar reach a deal to allow civilians and combatants to leave the besieged towns of Al-Fou’aa-Kafrayain, Madaya and Al-Zabadan in Idlib and Damascus governorates.^[26]
• Syrian Forces capture Deir Hafer in Eastern Aleppo according to an Army source.^[27]
• Turkey announces the end of its military operations in Syria, concludingOperation Euphrates Shield.^[28]

• The town ofKhan Shaykhun came undera heavy air attack, allegedly involvingchemical weapons, resulting in up to 100 deaths.^[29][30]

• Facilities and aircraft at the Syrian government'sShayrat Airbaseare hit by 59Tomahawk cruise missiles launched from theArleigh Burke-class guided-missile destroyersUSS Porter andUSS Ross in the EasternMediterranean.^[31][32] The U.S. claimed the strike was in response to intelligence that the 4 April Khan Shaykhun attack was conducted by the Syrian military. It was the first unilateral military action by the United States that directly targeted the Syrian government.

TheSyrian Army expands the buffer zone around Palmyra^[33] by capturing more than 230 square miles of territory around the city^[34]

• Pro-government media announce that west Damascus district ofZabadani is declared free of "militants" by the regime after the departure of 1,000 rebels and their families, and that Syrian army forces entered the town for the first time since the beginning of the Civil War.^[35][36]

• Timelines of the Syrian civil war
• 2017 in the Syrian civil war
• 2017 in Syria
• Conflicts in 2017
• Lists of armed conflicts in 2017

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