Battle of Ajnadayn

Battle of Ajnadayn
Part of Early Muslim conquests
DateJuly/August 634
Location
Ajnadayn, Palaestina Prima (Palestine)
Result Rashidun victory
Territorial
changes
Caliphate gained control of Nablus, Sebastia, Lod, Yibna, Amwas, Bayt Jibrin, and the Jaffa.
Belligerents
Byzantine Empire Rashidun Caliphate
Commanders and leaders
Vardan 
Aretion
Theodore
Vahan
A cubicularius 
A vicarius
A drungarius
Khalid ibn al-Walid
Amr ibn al-As
Abu Ubayda ibn al-Jarrah
Shurahbil ibn Hasana
Yazid ibn Abi Sufyan
Ubadah ibn al-Samit
Dhiraar ibn al-Azwar
Strength
Max. 40,000 (Primary sources)
c. 20,000 (Modern estimates)
Max. 500 – c. 20,000
Casualties and losses
50,000 killed (Primary arab sources)
1700 killed, 5000 wounded (modern estimates)
5,000 (Primary arab sources)

The Battle of Ajnadayn (Arabic: معركة أجنادين) was fought in July or August 634 (Jumada I or II, 13 AH), in a location close to Bayt Jibrin in Palestine; 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.