League of Communists of Yugoslavia (, Савез комуниста Југославије,
SKJ/СКЈ; ; ), before 1952 the
Communist Party of Yugoslavia (,
Комунистичка партија Југославије, , ), was a major
Communist party in
Yugoslavia. The party was founded as an opposition party in the
Kingdom of Serbs, Croats and Slovenes in 1919.