Battle of Ajnadayn
634 CE.
Shown on the map at 31.683°, 34.950°.
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; 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.
Text from the Wikipedia article Battle of Ajnadayn, licensed CC BY-SA 4.0.