عمار بن ياسر
According to Madelung, however, Hasan was against his father's policy on fighting with his opponents as he believed that these wars would cause division in the Muslim community. When Ali left Medina for Basra - and before the Battle of the Camel - Ali stopped somewhere and met the Meccan Qurayshite rebels in Basra. Al-Baladhuri writes that Hassan begged his father, Ali, to give up the war so that the Islamic community could agree on his caliphate. But Ali did not heed his advice. Before the Battle of Camel, Hasan was sent to Kufa along with Ammar ibn Yasir to collect force for Ali's army.