Karađorđević dynasty
Following the end of the First World War (1914–1918), the Kingdom of Montenegro was united with the Kingdom of Serbia on 26 (13 o.s.) November 1918, by the proclamation of the newly elected Podgorica Assembly, and soon after that, on 1 December of the same year, the Kingdom of Serbs, Croats and Slovenes was created, known after 1929 as the "Kingdom of Yugoslavia". The political and national unification was carried out under the auspices of the Karađorđević dynasty, and thus a long-standing dynastic rivalry between the two royal families, the Petrović–Njegoš dynasty of Montenegro and the Karađorđević dynasty of Serbia, was finally resolved, without mutual agreement.