The first civil war in Islam, also known as the "First Fitna" broke out in Islam during the rule of the fourth caliph Ali and lasted throughout his caliphate. The third caliph Uthman ibn Affan had been murdered by rebel Muslim groups who had political motives. After Ali took over, the most important problem he faced was that of punishing those responsible for murder. However many people felt that before accepting the position of the caliph, Ali should have focused his attention on finding and punishing the murderers. A group of people led by Muhammad's wife Aisha, her brothers in law Talhah and Zubair ibn al-Awam refused to recognize Ali's caliphate. They instead raised an army which met Ali's army at Basra in Iraq, originally for the purposes of negotiations. In the night, some fighting broke out, probably out of confusion or due to rebel groups who were involved in the infamous murder. This led to the "Battle of Bassorah" (also known as "Battle of the Camel") in which Ali's party emerged victorious. Aisha was escorted back to Medina honorably after the battle by Ali.