The Battle of Yarmouk was a major battle between the army of the Byzantine Empire and the Muslim forces of the Rashidun Caliphate. The battle consisted of a series of engagements that lasted for six days in August 636, near the Yarmouk River, along what today are the borders of Syria–Jordan and Syria–Israel, east of the Sea of Galilee. The result of the battle was a complete Muslim victory which ended Byzantine rule in Syria. The Battle of Yarmouk is regarded as one of the most decisive battles in military history and it marked the first great wave of early Muslim conquests after the death of the Prophet Muhammad, heralding the rapid advance of Islam into the then Christian Levant.