For ten years, it was known as the Kingdom of Serbs, Croats and Slovenes. It began using the name 'Yugoslavia' in 1929. The name 'Yugoslavia' is Serbo-Croatian for 'Land of the Southern Slavs'. The Kingdom was invaded by the Axis Powers in 1941 and quickly fell during World War II. A Federal Democratic Republic was declared in 1943 with the King's approval, but the monarchy was abolished shortly after.