WHAT HAPPENED IN THE YEAR 636 ADThe Battle of Yarmouk (Arabic: معركة اليرموك‎, also spelled Yarmuk, Yarmuq or, in Greek, Hieromyax, Ἱερομύαξ, or Iermouchas, Ιερμουχάς) was a major battle between the Muslim Arab forces of the Rashidun Caliphate and the armies of the Eastern Roman Empire. The battle consisted of a series of engagements that lasted for six days in August 636, near the Yarmouk River, along what is today the border between Syria and Jordan, south-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,^[5][6] and it marked the first great wave of Islamic conquests after the death of prophet Muhammad, heralding the rapid advance of Islam into the then Christian Levant.