After the conquest of
Jerusalem,
Caliph Umar went back to his capital city of
Madinah while Commander
Yazeed proceeded to Caesarea and once again laid siege to the port city. Commanders Amr bin al-A’as and Sharhabeel marched to reoccupy
Palestine and Jordan, which was completed by the end of the year.
Abu Ubaidah ibn al-Jarrah and
Khalid ibn Walid, with an army of 17,000 men, set off from Jerusalem to conquer all of northern Syria. Abu Ubaidah marched to
Damascus, which was already in
Muslim hands, and then to
Emesa, which welcomed his return. His next objective was Qinnasrin which was approached with Khalid and the Mobile Guard in the lead. After a few days the Mobile Guard reached Hazir, three miles east of Qinnasrin, where it was attacked in strength by the Byzantines. The Byzantine garrison commander at Qinnasrin was a general named
Menas, a distinguished soldier who was loved by his men. Menas knew that if he stayed in Qinnasrin, he would be besieged by the Rashidun army and would eventually have to surrender, as he could expect no help from the emperor. He therefore decided to take the offensive and attack the leading elements of the Rashidun army well forward of the city and attempt to defeat them before they could be joined by the main body. With this plan in mind, Menas attacked the Mobile Guard at Hazir with a force whose strength was about 7,000 men; in this effort, he either did not know that Khalid was present with the leading elements of the Muslim army or did not believe all that he had heard about Khalid ibn Walid. According to Peter Crawford, the numbers recorded for the subsequent Battle of Hazir are disputed. Due to the mass evacuation of Syria ordered by Heraclius, it would be surprising if Menas had even a tenth of this recorded figure, while it is somewhat unlikely Abu Ubayda and Khalid would have as many men as this with the detachment of the corps of Yazid, Shurahbil, and Amr. ==Battle==