The battle begun with Muslim's frontal attack, after engaging for some time Muslims feint a retreat and fall back in an organized manner. Mihran, sensing the time is on hand to launch an offensive for him, ordered the entrenchments to be bridged. Once the Persian army had attained the battle formation he ordered a general attack. Up till now the battle had progressed as both the commanders had planned. Once Mihran engaged his troops in an open battlefield, Hashim decided to carry out his maneuver. He dispatched a strong cavalry regiment under one of his most illustrious cavalry commanders; Qaqa ibn Amr, to capture the bridge over the entrenchments. The bridge was not heavily guarded as virtually all the Persian troops available were used to assault Muslim main body. Qaqa maneuvered around Persian right flank quickly captured the bridge at their rear. The news of a strong Muslim cavalry detachment in their rear was a serious setback to Persian morale. Hashim launched a frontal attack with Muslim infantry while Qaqa stuck at Persian rear with his cavalry. Persian troops were trapped between Muslim army and the natural barriers on the battlefield. Nevertheless, thousands of them managed to escape and reached the Jalula fortress.