Socialist Youth Union of Yugoslavia

Alliance of the Communist Youth of Yugoslavia (Serbo-Croatian: Savez komunističke omladine Jugoslavije, SKOJ), commonly known in English as the Young Communist League of Yugoslavia, or simply Communist Youth, was the youth wing of the Communist Party of Yugoslavia from 1919 to 1948. Although it was banned just two years after its establishment and at times ruthlessly prosecuted, it continued to work clandestinely and was an influential organization among revolutionary youth in the Kingdom of Yugoslavia, and consequently became a major organizer of Partisan resistance to Axis occupation and local Quisling forces. After World War II, SKOJ became a part of a wider organization of Yugoslav youth, the People's Youth of Yugoslavia, which later became the League of Socialist Youth of Yugoslavia.

SKOJ was founded in Zagreb on October 10, 1919 as a political organization of revolutionary youth the youth which followed the policy of the communist Socialist Workers' Party of Yugoslavia.

Regional committees were originally established but they were abolished in 1920. In 1921, the organization was banned together with the party, which had in the meantime been renamed Communist Party of Yugoslavia. Two congresses were held clandestinely during the 1920s, the Second Congress in June 1923, and the Third Congress in June 1926. SKOJ was affiliated to the Communist Youth International. Regional committees were reestablished in 1939.

After Axis powers occupied Yugoslavia in 1941, SKOJ organized a united youth front with the program of struggle against fascism and war, Anti-Fascist Youth Committees which at the Congress of Anti-Fascist Youth of Yugoslavia in Bihać in 1942 united into the Unified League of Anti-Fascist Youth of Yugoslavia (Ujedinjeni savez antifašističke omladine Jugoslavije - USAOJ). SKOJ became a part of the umbrella organization, but continued to act autonomously within it.

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