Josip Broz, commonly known as Tito was a Yugoslav communist revolutionary and politician who served in various positions of national leadership from 1943 until his death in 1980. During World War II, he led the Yugoslav Partisans, often regarded as the most effective resistance movement in German-occupied Europe. He also served as prime minister from 2 November 1944 to 29 June 1963 and president of the Socialist Federal Republic of Yugoslavia from 14 January 1953 until his death. His political ideology and policies are known as Titoism.