Query: Yugoslavia failed to be a country.

Relevant passages:
Yugoslavia <=SEP=> Yugoslavia ( Jugoslavija / Југославија , Jugoslavija , Југославија ) was a country in Southeast Europe during most of the 20th century . It came into existence after World War I in 1918 under the name of the Kingdom of Serbs , Croats and Slovenes by the merger of the provisional State of Slovenes , Croats and Serbs ( itself formed from territories of the former Austro-Hungarian Empire ) with the formerly independent Kingdom of Serbia . The Serbian royal House of Karađorđević became the Yugoslav royal dynasty . Yugoslavia gained international recognition on 13 July 1922 at the Conference of Ambassadors in Paris . The country was named after the South Slavic peoples and constituted their first union , following centuries in which the territories had been part of the Ottoman Empire and Austria-Hungary .   Renamed the Kingdom of Yugoslavia on 3 October 1929 , it was invaded by the Axis powers on 6 April 1941 . In 1943 , a Democratic Federal Yugoslavia was proclaimed by the Partisan resistance . In 1944 , the king recognised it as the legitimate government , but in November 1945 the monarchy was abolished . Yugoslavia was renamed the Federal People 's Republic of Yugoslavia in 1946 , when a communist government was established . It acquired the territories of Istria , Rijeka , and Zadar from Italy . Partisan leader Josip Broz Tito ruled the country as president until his death in 1980 . In 1963 , the country was renamed again as the Socialist Federal Republic of Yugoslavia ( SFRY ) .   The constituent six socialist republics that made up the country were the SR Bosnia and Herzegovina , SR Croatia , SR Macedonia , SR Montenegro , SR Serbia , and SR Slovenia . Serbia contained two Socialist Autonomous Provinces , Vojvodina and Kosovo , which after 1974 were largely equal to the other members of the federation . After an economic and political crisis in the 1980s and the rise of nationalism , Yugoslavia broke up along its republics ' borders , at first into five countries , leading to the Yugoslav Wars .   After the breakup , the republics of Serbia and Montenegro formed a reduced federation , the Federal Republic of Yugoslavia ( FRY ) , which aspired to the status of sole legal successor to the SFRY , but those claims were opposed by the other former republics . Eventually , Serbia and Montenegro accepted the opinion of the Badinter Arbitration Committee about shared succession . Serbia and Montenegro themselves broke up in 2006 and became independent states , while Kosovo proclaimed independence in 2008 .

Kingdom of Yugoslavia <=SEP=> The Kingdom of Yugoslavia ( Kraljevina Jugoslavija , Краљевина Југославија , `` Kingdom of South Slavia '' ) was a state in Southeast Europe and Central Europe , that existed during the interwar period ( 1918 -- 1939 ) and first half of World War II ( 1939 -- 1943 ) . It was formed in 1918 by the merger of the provisional State of Slovenes , Croats and Serbs ( itself formed from territories of the former Austro-Hungarian Empire ) with the formerly independent Kingdom of Serbia . The Kingdom of Montenegro had united with Serbia five days previously , while the regions of Kosovo , Vojvodina and Vardar Macedonia were parts of Serbia prior to the unification . For its first eleven years of existence , the Kingdom was officially called the Kingdom of Serbs , Croats and Slovenes , but the term `` Yugoslavia '' was its colloquial name from its origins . The official name of the state was changed to `` Kingdom of Yugoslavia '' by King Alexander I on 3 October 1929 .   The state was ruled by the Serbian dynasty of Karađorđević , which previously ruled the Kingdom of Serbia under Peter I from 1903 ( after the May Overthrow ) onwards . Peter I became the first king of Yugoslavia until his death in 1921 . He was succeeded by his son Alexander I , who had been regent for his father . He was known as `` Alexander the Unifier '' and he renamed the kingdom `` Yugoslavia '' in 1929 . He was assassinated in Marseille by Vlado Chernozemski , a member of the Internal Macedonian Revolutionary Organization ( IMRO ) , during his visit to France in 1934 . The crown passed to his then-still under-aged son Peter . His cousin Paul ruled as Prince regent until 1941 , when Peter II would come of age . The royal family flew to London the same year , prior to the country being invaded by the Axis powers .   In April 1941 , the country was occupied and partitioned by the Axis powers . A royal government-in-exile , recognized by the United Kingdom and , later , by all the Allied powers , was established in London . In 1944 , after pressure from the British Prime Minister Winston Churchill , the King recognized the government of Democratic Federal Yugoslavia as the legitimate government . This was established on 2 November following the signing of the Treaty of Vis by Ivan Šubašić ( on behalf of the Kingdom ) and Josip Broz Tito ( on behalf of the Yugoslav Partisans ) .