Khalid gave the enemy the option to cross the Euphrates. As soon as the enemy had crossed the Euphrates, Khalid commanded the Muslim force to go into action. The united forces of the Persians and the Byzantines had the river at their back. At Firaz, Khalid adopted the same tactics as he had adopted at Mazar. As the front ranks of both the forces committed themselves in the fighting, Khalid fixed his enemy on either flank with the help of his rear wings. Making a swift movement, the Muslims dashed for the bridge on the river, and succeeded in occupying it. The enemy was thus held in a pincer movement.
