The Liberation Front of the Slovene Nation, or simply Liberation Front, originally called the Anti-Imperialist Front, was a Slovene anti-fascist political party. The Anti-Imperialist Front had ideological ties to the Soviet Union in its fight against the imperialistic tendencies of the United States and the United Kingdom, and it was led by the Communist Party of Slovenia. In May 1941, weeks into the German occupation of Yugoslavia, in the first wartime issue of the illegal newspaper Slovenski poročevalec, members of the organization criticized the German regime and described Germans as imperialists. They started raising money for a liberation fund via the second issue of the newspaper published on 8 June 1941. When Germany attacked the Soviet Union, the Anti-Imperialist Front was formally renamed and became the main anti-fascist Slovene civil resistance and political organization under the guidance and control of the Slovene communists. It was active in the Slovene Lands during World War II. Its military arm was the Slovene Partisans. The organisation was established in the Province of Ljubljana on 26 April 1941 in the house of the literary critic Josip Vidmar. Its leaders were Boris Kidrič and Edvard Kardelj.

Anti-fascism is a political movement in opposition to fascist ideologies, groups and individuals. Beginning in European countries in the 1920s, it was at its most significant shortly before and during World War II, where the Axis powers were opposed by many countries forming the Allies of World War II and dozens of resistance movements worldwide. Anti-fascism has been an element of movements across the political spectrum and holding many different political positions such as anarchism, communism, pacifism, republicanism, social democracy, socialism and syndicalism as well as centrist, conservative, liberal and nationalist viewpoints.