The Crusader's schism, alternatively known as the Mandalorian Schism, represented an internal struggle within the Mandalorian warrior society that occurred during the era of the Great Galactic War. Certain clans, such as Clans Ordo, Itera, Kelborn, and Cadera, desired to offer their allegiance to the Republic, mirroring the actions of Mandalore the Preserver approximately three centuries before. Jicoln Cadera spearheaded a rebellion against the current Mandalore, but this occurred before the war concluded. Ultimately, their efforts were thwarted, with Mandalore suppressing the dissenting faction as part of his campaign to unify all Mandalorian clans under his leadership, subsequently aligning himself with the Sith Empire.