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Battle of Ajnadayn

Battle of Ajnadayn
Part of the Muslim conquest of Syria (Arab–Byzantine wars)
Date July/August 634
Location Ajnadayn, Palaestina Prima (now Israel and Palestine)
Result Decisive Rashidun Caliphate victory
Territorial
changes
Southern Syria and Palestine annexed by Muslims
Belligerents
Byzantine Empire Rashidun Caliphate
Commanders and leaders
Vardan 
Theodore
Khalid ibn al-Walid
Abu Ubaydah ibn al-Jarrah
Amr Ibn al-As
Sharhabeel ibn Hasana
Yazid ibn Abu Sufyan
Dhiraar bin Al-Azwar
Strength
max. 10,000 – ca. 20,000 max. 10,000 – ca. 20,000
Casualties and losses
50,000 (Al-Waqidi),
Modern estimates unknown.
575 (Al-Waqidi)
Modern estimates unknown.

The Battle of Ajnadayn (Arabic: معركة أجنادين‎‎) was fought in July or August 634 (Jumada I or II, 13 AH), in an unknown location close to Beit Guvrin in present-day Israel; it was the first major pitched battle between the Byzantine (Roman) Empire and the army of the Arab Rashidun Caliphate. The result of the battle was a decisive Muslim victory. The details of this battle are mostly known through Muslim sources, such as the ninth century historian al-Waqidi.

According to David Nicolle, the Rashidun army left the capital Medina probably in the autumn of 633, but possibly at the beginning of 634. They first engaged and defeated the Byzantines at Dathin on February 4; after that Emperor Heraclius, then stationed in Emesa, had reinforcements sent south to protect Caesarea Maritima. As a possible reaction, commander Khalid ibn al-Walid was ordered to interrupt operations against the Sassanian Empire and reach Syria, which brought him to engage and defeat the Byzantine-allied Ghassanids by April 24, permitting him to enter almost unopposed in Bosra. At this point, Khalid converged with several armies, led by generals such as Abu Ubaydah ibn al-Jarrah, Yazid ibn Abu Sufyan, Amr ibn al-A'as and Shurahbil Ibn Hasanah.


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