 Yalbugha became the regent of Hasan's successor and the young son of the late sultan Hajji, al-Mansur Muhammad.By then, mamluk solidarity and loyalty to the emirs had dissipated.To restore discipline and unity within the Mamluk state and military, Yalbugha applied the rigorous educational methods used for mamluks during the reigns of sultans Baybars and Qalawun.