Al-Imam al-Mansur al-Mutawakil 'ala Allah, also known as Sheikh al-Mansur ("The-Sustained"), born Ushurma (1732–1794) was a Chechen Islamic religious and military leader who led the resistance against Catherine the Great's imperialist expansion into the Caucasus during the late 18th century. He remains a legendary national hero of the Chechen people.