Yugoslavia was in a place.
Croatia became merged with Serbia and Slovenia to form the nation of Yugoslavia in 1918 . Yugoslavia ( Jugoslavija / Југославија , Jugoslavija , Југославија ) was a country in Southeast Europe during most of the 20th century . Renamed the Kingdom of Yugoslavia on 3 October 1929 , it was invaded by the Axis powers on 6 April 1941 . Yugoslavia was renamed the Federal People 's Republic of Yugoslavia in 1946 , when a communist government was established . In 1963 , the country was renamed again as the Socialist Federal Republic of Yugoslavia ( SFRY ) .