Tricolour of Yugoslavia
Yugoslavia is a term casually used for three separate political entities.
The first was a kingdom formed in 1918 under name Kingdom of Serbs, Croats and Slovenes, whose name changed name to the Kingdom of Yugoslavia in 1929 and existed under that name until it was invaded in 1941 by Axis powers.
The second was a Communist state established immediately after World War II in 1945 under the name Democratic Federal Yugoslavia, which in 1946 changed its name to the Federal People's Republic of Yugoslavia and again in 1963 to the Socialist Federal Republic of Yugoslavia, under which it existed until 1991-1992 when four of its six constituent republics Slovenia, Croatia, Macedonia and Bosnia-Herzegovina separated.
As a result a federation named Federal Republic of Yugoslavia was formed between the remaining republics of Serbia and Montenegro, which in 2003 remade its internal structure into a loose commonwealth and changed its name to Serbia and Montenegro.
Country code: YU
See also History of Yugoslavia