Short answers, pulled from the story.
The Conference of Ambassadors granted international recognition to Yugoslavia on the 13th of July 1922. This new state emerged from the merger of the Kingdom of Serbia with the provisional State of Slovenes, Croats and Serbs following World War I.
Marshal Josip Broz Tito ruled Yugoslavia from 1944 until his death on the 4th of May 1980. He served first as prime minister and later as president before being named President for life in 1963.
An economic crisis erupted after the oil price shock due to disastrous policies involving vast Western capital borrowed to fund growth through exports. Western economies went into recession which decreased demand for Yugoslav imports and created a large debt problem leading to massive layoffs.
Slovenia and Croatia became the first republics to declare independence from Yugoslavia on the 25th of June 1991. The Federal Executive Council ordered the army to take control of borders immediately resulting in the Ten-Day War.
Montenegro became an independent nation in June 2006 after results of a May 2006 referendum rendered Serbia and Montenegro no longer existent. Serbia became the legal successor while Montenegro re-applied for international organization membership following this split.