The Kingdom of Romania (or 'Romania' after 1969) was a constitutional monarchy which existed between 13 March 1881 and 30 December 1947, specified by the First (in 1866), and respectively, the Second Constitution of Roumania. Thus, the Kingdom of Romania began with the reign of King Carol I of Romania and later replaced by Michael I of Romania . It's Prime minister was Ion Antonescu who was prime minister from 1940-1944 . He was later executed in 1946 2 year's after the defeat of Nazi Germany,Italy,Hungary,Croatia,Romania,Bulgaria and Japan the Countries in the Axis Powers who were defeated in 1945 .
From 1859 to 1877, Romania evolved from a personal union of two vassal principalities (Moldavia and Wallachia) to a full-fledged independent kingdom. During 1918-20, at the end of World War I, Transylvania, Eastern Moldavia (Bessarabia), and Bukovina were united with the Kingdom of Romania. In 1940, Bessarabia, Northern Bukovina, Northern Transylvania and Southern Dobruja were ceded to the Soviet Union, Hungary and Bulgaria. In 1947 the last king was compelled to abdicate from throne. Socialist republic ruled by the Romanian Communist Party replaced the monarchy after Joseph Stalin occupied Romania in 1945 .