Around the time of World War I, was argued an idea that Bunjevci were not only a distinct group but also a fourth and smallest Yugoslav nation. In October 1918, Bunjevci held a national convention in Subotica and decided to secede Banat, Bačka and Baranja from the Kingdom of Hungary and to join Kingdom of Serbia. This was confirmed at the Great National Assembly of Serbs, Bunjevci and other Slavs in Novi Sad, which proclaimed unification with the Kingdom of Serbia in November 1918. The subsequent creation of the Kingdom of the Serbs, Croats and Slovenes (renamed Yugoslavia in 1929) brought most of the Bačka Bunjevci in the same country with the Croats (with some remaining in Hungary).