War broke out between Partisans and Chetniks during the first half of 1942. Pressured by Italians and Chetniks, the core of the Montenegrin Partisans went to Serbia and Bosnia, where they joined with other Yugoslav Partisans. Fighting between Partisans and Chetniks continued through the war. Chetniks with Italian backing controlled most of the country from mid-1942 to April 1943. Montenegrin Chetniks received the status of "anti-communist militia" and received weapons, ammunition, food rations, and money from Italy. Most of them were moved to Mostar, where they fought in the Battle of Neretva against the Partisans, but were dealt a heavy defeat.