The Zamość uprising comprised World War II partisan operations, 1942–1944, by the Polish resistance (primarily the Home Army and Peasant Battalions) against Germany's Generalplan-Ost forced expulsion of Poles from the Zamość region (Zamojszczyzna) and the region's colonization by German settlers. The Polish defense of the Zamość region was one of Poland's largest resistance operations of World War II.