The Battle of Yarmuk

The Roman plan was to advance quickly beginning in May of 636 and take on the Arab forces. The two forces met on what is now the borders of Syria and Jordan east of the Sea of Galilee near a river named Yarmuk. Day one was essentially a skirmish but day two the Byzantines attacked on both flanks and came close to crushing the Arabs. However, at the end of the day the Muslims lost ground.