The battle of Zumail was fought in 633 CE in what is now Iraq. It was a major Muslim victory in their conquest of that area. Under cover of night the Muslims attacked the Christian-Arab forces from three different sides . The Christian-Arab forces were unable to withstand the Muslim's surprise attack and soon dispersed but failed to escape from the battlefield and became the victims of a three sided attack by Khalid ibn al-Walid's army. At Zumail nearly the whole Christian Arab army was slaughtered by Khalid's Corps.