The Battle of Yarmouk was a major battle between the army of the Byzantine Empire and the Muslim Arab 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.