Hasan renounced his right to the caliphate in a compromise with Mu'awiya, which the Shi'a view as Hasan's rational recognition of his own constraints at the time, but Husayn sought to restore the caliphate to the family of Ali by military means. When Muawiyah died in the 680 and his son Yazid I assumed the caliphate, Husayn renewed his efforts to regain the caliphate. On the advice of supporters in Kufa, a supposed stronghold of Shia support, Husayn and a small numbers of his family and supporters traveled to Kufa, camping out in nearby Karbala.