 Complete the following phrase:  During the battle, known as the Battle of the Bridge, the army of Bahman had an advantage: the elephants in his army frightened the Arabs horses, and which later resulted in the death of Abu Ubaid. The bridge was then broken by an Arab, and around 4,000 Arabs died by drowning and many others were killed by Bahmans forces. Al-Muthanna managed to flee from the bridge and rally 3,000 Arab survivors; however, some of them fled back to Medina. Bahman did not pursue the fleeing Arab army. In 636 during the 