Subdivisions of the Kingdom of Yugoslavia

Provinces (pokrajine) were: These were subdivided into districts and counties: The Vidovdan Constitution of 1921 established the Kingdom of Serbs, Croats, and Slovenes as a unitary state and, in 1922, 33 new administrative oblasts (counties) ruled from the centre were instituted.

These bore no relation to the earlier divisions and, in the interest of promoting Yugoslavism, statism and multiculturalism, were not given any ethnic or national names.

They were unpopular in parts of the country since their formation, which led to the creation of banates.

From 1929, the kingdom was subdivided into nine new provinces or banates called banovinas.

Like Sava, its capital was Zagreb, the second largest city in the country.

Provinces of the Kingdom of Serbs, Croats and Slovenes (1918–1922).
Kingdom of Croatia-Slavonia counties from Austria-Hungary remained until 1922
Oblasts of the Kingdom of Serbs, Croats, and Slovenes
Banates (banovinas) of the Kingdom of Yugoslavia between 1929 and 1939
By creating Banovina Croatia in 1939, the regime wanted to solve the Croatian question in Yugoslavia.