Q: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
This man merged his forces and the government of Peter II by signing the Treaty of Vis, and he was excommunicated by the Pope after imprisoning Aloysius Stepinac for aiding the Ustashi movement. This man triggered the Informbiro Period by supporting the Communist movement in Greece, and his forces slaughtered the rival Chetnicks during the Bleiburg Massacre. His split with Stalin led him to help establish the Non-Aligned Movement, and he led the Partisans during World War II. For 10 points, name this communist leader who ruled Yugoslavia until his death in 1980.
A:
History