League of Communists of Yugoslavia in the context of "Republic of Serbia (1992–2006)"

After a period of political and economic crisis in the 1980s, the constituent republics of the Socialist Federal Republic of Yugoslavia split apart in the early 1990s. Unresolved issues from the breakup caused a series of inter-ethnic Yugoslav Wars from 1991 to 2001 which primarily affected Bosnia and Herzegovina, neighbouring parts of Croatia and, some years later, Kosovo.

Following the Allied victory in World War II, Yugoslavia was set up as a federation of six republics, with borders drawn along ethnic and historical lines: Bosnia and Herzegovina, Croatia, Macedonia, Montenegro, Serbia, and Slovenia. In addition, two autonomous provinces were established within Serbia: Vojvodina and Kosovo. Each of the republics had its own branch of the League of Communists of Yugoslavia party and a ruling elite, and any tensions were solved on the federal level. The Yugoslav model of state organisation, as well as a "middle way" between planned and liberal economy, had been a relative success, and the country experienced a period of strong economic growth and relative political stability up to the 1980s, under Josip Broz Tito. After his death in 1980, the weakened system of federal government was left unable to cope with rising economic and political challenges.

The Socialist Federal Republic of Yugoslavia (commonly abbreviated as SFRY or SFR Yugoslavia), known from 1945 to 1963 as the Federal People's Republic of Yugoslavia, commonly referred to as Socialist Yugoslavia or simply Yugoslavia, was a country in Central and Southeast Europe. It was established in 1945, following World War II, and lasted until 1992, dissolving amid the onset of the Yugoslav Wars. Spanning an area of 255,804 square kilometres (98,766 sq mi) in the Balkans, Yugoslavia was bordered by the Adriatic Sea and Italy to the west, Austria and Hungary to the north, Bulgaria and Romania to the east, and Albania and Greece to the south. It was a one-party socialist state and federation governed by the League of Communists of Yugoslavia, and had six constituent republics: Bosnia and Herzegovina, Croatia, Macedonia, Montenegro, Serbia, and Slovenia. Within Serbia was the Yugoslav capital city of Belgrade as well as two autonomous Yugoslav provinces: Kosovo and Vojvodina.

The country emerged as Democratic Federal Yugoslavia on 29 November 1943, during the second session of the Anti-Fascist Council for the National Liberation of Yugoslavia midst World War II in Yugoslavia. Recognised by the Allies of World War II at the Tehran Conference as the legal successor state to Kingdom of Yugoslavia, it was a provisionally governed state formed to unite the Yugoslav resistance movement. Following the country's liberation, King Peter II was deposed, the monarchical rule was ended, and on 29 November 1945, the Federal People's Republic of Yugoslavia was proclaimed. Led by Josip Broz Tito, the new communist government sided with the Eastern Bloc at the beginning of the Cold War but pursued a policy of neutrality following the 1948 Tito–Stalin split; it became a founding member of the Non-Aligned Movement, and transitioned from a command economy to market-based socialism. The country was renamed Socialist Federal Republic of Yugoslavia in 1963.

The Croatian Partisans, officially the National Liberation Movement in Croatia (Croatian: Narodnooslobodilački pokret u Hrvatskoj; NOP), were part of the anti-fascist National Liberational Movement in the Axis-occupied Yugoslavia which was "perhaps Europe's most effective anti-Nazi resistance movement". It was led by Yugoslav revolutionary communists during the World War II. NOP was under the leadership of the League of Communists of Yugoslavia (KPJ) and supported by many others, with Croatian Peasant Party members contributing to it significantly. NOP units were able to temporarily or permanently liberate large parts of Croatia from occupying forces. Based on the NOP, the Federal Republic of Croatia was founded as a constituent of the Democratic Federal Yugoslavia.

The League of Communists of Serbia (Serbian: Савез комуниста Србије, romanized: Savez komunista Srbije, abbr. SKS), known as the Communist Party of Serbia (Serbian: Комунистичка партија Србије, romanized: Komunistička partija Srbije, abbr. KPS) until 1952, was the ruling political party of Serbia from 1945 to 1990. It was the Serbian branch of the League of Communists of Yugoslavia, known until 1952 as the Communist Party of Yugoslavia. The two autonomous provinces within Serbia had their own branches of the federal party: the League of Communists of Kosovo and the League of Communists of Vojvodina.

The republic-level branches of Kosovo and Vojvodina were associated with the League of Communists of Serbia as its "integral parts". Under the 1974 Yugoslav Constitution, greater power was devolved to these republic-level branches. Following the 8th Session of the Central Committee of the League of Communists of Serbia in 1987, the party was taken over by the populist faction led by Slobodan Milošević. Milošević appeased nationalists in Serbia by promising to reduce the level of autonomy within the autonomous provinces of Kosovo and Vojvodina. This policy increased ethnic tensions with the other republics and nationalities and led to the Yugoslav Wars. During the early 1990s, the growing ethnic tensions between the republics of Yugoslavia led to the break-up of the federal party.

World War II in the Kingdom of Yugoslavia began on 6 April 1941, when the country was invaded and swiftly conquered by Axis forces and partitioned among Germany, Italy, Hungary, Bulgaria and their client regimes. Shortly after Germany attacked the USSR on 22 June 1941, the communist-led republican Yugoslav Partisans, on orders from Moscow, launched a guerrilla liberation war fighting against the Axis forces and their locally established puppet regimes, including the Axis-allied Independent State of Croatia (NDH) and the Government of National Salvation in the German-occupied territory of Serbia. This was dubbed the National Liberation War and Socialist Revolution in post-war Yugoslav communist historiography. Simultaneously, a multi-side civil war was waged between the Yugoslav communist Partisans, the Serbian royalist Chetniks, the Axis-allied Croatian Ustaše and Home Guard, Serbian Volunteer Corps and State Guard, Slovene Home Guard, as well as Nazi-allied Russian Protective Corps troops.

Both the Yugoslav Partisans and the Chetnik movement initially resisted the Axis invasion. However, after 1941, Chetniks extensively and systematically collaborated with the Italian occupation forces until the Italian capitulation, and thereon also with German and Ustaše forces. The Axis mounted a series of offensives intended to destroy the Partisans, coming close to doing so in the Battles of Neretva and Sutjeska in the spring and summer of 1943.

Titoism is a socialist political philosophy most closely associated with Josip Broz Tito and refers to the ideology and policies of the League of Communists of Yugoslavia (LCY) during the Cold War. It is characterized by a broad Yugoslav identity, socialist workers' self-management, a political separation from the Soviet Union, and leadership in the Non-Aligned Movement.

Tito led the communist Yugoslav Partisans during World War II in Yugoslavia. After the war, tensions arose between Yugoslavia and the Soviet Union. Although these issues alleviated over time, Yugoslavia still remained largely independent in ideology and policy due to the leadership of Tito, who led Yugoslavia until his death in 1980.