After World War I, in the Kingdom of Yugoslavia those Serbs who were left in Dubrovnik opted for the Yugoslav national unity, in contrast to Croats in the city who opted for the preserving of autonomous status of Croatia in Yugoslavia and unification of Dalmatia with Croatia-Slavonia. In 1939 Dubrovnik with its district became part of Banovina of Croatia which was established the same year. Those circumstances intensified emigration. During the Independent State of Croatia (1941-1945), the city completely reoriented itself to Croatian culture.