In 1913, the Kingdom of Romania conquered Southern Dobruja after the Bulgarian defeat in the Second Balkan War. The country had already acquired Northern Dobruja in 1878. This sparked revisionalist feelings in Bulgaria. Following the occupation of the Romanian regions of Bessarabia and Northern Bukovina by the Soviet Union in June 1940, Romania sought protection among the Axis powers, but it was demanded to first resolve its territorial disputes with its neighbors. Thus, on 30 August, Romania ceded Northern Transylvania to Hungary in the Second Vienna Award, while at the Treaty of Craiova of 7 September, Romania returned Southern Dobruja to Bulgaria.