

TheHoly League (Latin:Liga Sancta,Spanish:Liga Santa,Italian:Lega Santa) of 1571 was arranged byPope Pius V and included the majorCatholic powers ofsouthern Europe (Iberian Peninsula andItalian Peninsula), specifically theSpanish Empire as well as theItalian maritime powers.It was intended to break theOttoman Empire’s control of the eastern Mediterranean Sea and was formally concluded on 25 May 1571.
The League's members were:
TheseChristian states were to have a force of 200galleys, 100 other ships, 50,000 infantry, 4,500 cavalry and adequate artillery ready by 1 April each year.John of Austria, illegitimate half-brother of KingPhilip II of Spain, was designated supreme commander.[2]The League kept membership open for theHoly Roman Empire,France andPortugal, but none of them joined. The Empire preferred to maintain its truce with Constantinople, while France had an activeanti-Spanish alliance with the Ottomans. Portugal had no forces to spare, owing to its heavy engagement in its ownMoroccan campaign, its ongoing maritime confrontations with the Ottomans in theRed Sea and theIndian Ocean, and colonial conflicts with theMalaccan andJohorean Sultanates.
The League initially assembled a fleet to aid the Venetian defenders ofCyprus which was invaded by Ottoman forces under the command ofLala Mustafa in July 1570, but was too late to prevent the island's capture by the Ottomans.
On 7 October 1571, the League won a decisive victory over the Ottoman fleet at theBattle of Lepanto in theGulf of Patras.[3] The fleet of the Holy League in this engagement consisted of 212 warships (206 galleys and 6galleasses, the modern large galleys developed by Venice) with 1,815 guns and carrying 28,500 infantry soldiers. The majority of warships were Venetian (6 galleasses, 109 galleys), the next largest contingent were Spanish (49 galleys, including 26 galleys from Naples, Sicily and other Italian territories), and Genoese (27 galleys), with additional warships from the Papal States (seven galleys), the Order of Saint Stephen from the Grand Duchy of Tuscany (five galleys), the Duchy of Savoy and the Knights of Malta (three galleys each), and some privately owned galleys in Spanish service.[4]
The victory at Lepanto confirmed thede facto division of the Mediterranean, with the eastern half under firm Ottoman control and the western half under the Habsburgs and their Italian allies.[5]
The following year, as the allied Christian fleet resumed operations, it faced a renewed Ottoman navy of 200 vessels underKılıç Ali Pasha, but the Ottoman commander actively avoided engaging the allied fleet and headed for the safety of the fortress ofModon. The arrival of the Spanish squadron of 55 ships evened the numbers on both sides and opened the opportunity for a decisive blow, but friction among the Christian leaders and the reluctance of Don John squandered the opportunity.[6] the holy league attempted to captureNavarino but failed.
Pius V died on 1 May 1572. The diverging interests of the League members began to show, and the alliance began to unravel. In 1573, the Holy League fleet failed to sail altogether; instead, Don John attacked andtook Tunis, only for it to beretaken by the Ottomans in 1574. Venice, fearing the loss of her Dalmatian possessions and a possible invasion ofFriuli, and eager to cut her losses and resume the trade with the Ottoman Empire, initiated unilateral negotiations with thePorte.[7] The Holy League was disbanded with the peace treaty of 7 March 1573, which concluded theWar of Cyprus.