The Crusader's schism, also known as the Mandalorian Schism, was a conflict within the Mandalorian warrior culture during the Great Galactic War. Some of the clans, including Clans Ordo, Itera, Kelborn, and Cadera, wanted to support the Republic as Mandalore the Preserver had three centuries prior, and Jicoln Cadera led an uprising against the acting Mandalore before the war ended. They were unsuccessful, and Mandalore crushed the faction in his quest to unite the Mandalorian clans under his banner and went on to support the Sith Empire.