[custom_adv] Muammar Muhammad Abu Minyar al-Gaddafi, commonly known as Colonel Gaddafi, was a Libyan revolutionary, politician and political theorist. [custom_adv] Francisco Franco Bahamonde was a Spanish general who led the Nationalist forces in overthrowing the Second Spanish Republic during the Spanish Civil War and thereafter ruled over Spain from 1939 to 1975 as a dictator, assuming the title Caudillo. [custom_adv] Osama bin Mohammed bin Awad bin Laden, also rendered Usama bin Ladin, was a founder of the pan-Islamic militant organization al-Qaeda. The group is designated as a terrorist group by the United Nations Security Council, the North Atlantic Treaty Organization, the European Union, and various countries. [custom_adv] Joseph Vissarionovich Stalin was a Georgian revolutionary and political leader who ruled the Soviet Union from 1927 until his death in 1953. He served as both General Secretary of the Communist Party of the Soviet Union and Chairman of the Council of Ministers of the Soviet Union. [custom_adv] Adolf Hitler was an Austrian-born German politician who was the dictator of Germany from 1933 to 1945. He rose to power as the leader of the Nazi Party, becoming Chancellor in 1933 and then assuming the title of Führer und Reichskanzler in 1934. [custom_adv] Robert Gabriel Mugabe ( 21 February 1924 – 6 September 2019) was a Zimbabwean revolutionary and politician who served as Prime Minister of Zimbabwe from 1980 to 1987 and then as President from 1987 to 2017.