Kosovo was split into four counties, three being a part of Serbia (Zvečan, Kosovo and southern Metohija) and one of Montenegro (northern Metohija). However, the new administration system since 26 April 1922 split Kosovo among three districts (oblast) of the Kingdom: Kosovo, Raška and Zeta. In 1929, the country was transformed into the Kingdom of Yugoslavia and the territories of Kosovo were reorganised among the Banate of Zeta, the Banate of Morava and the Banate of Vardar. In order to change the ethnic composition of Kosovo, between 1912 and 1941 a large-scale Serbian re-colonisation of Kosovo was undertaken by the Belgrade government. Meanwhile, Kosovar Albanians' right to receive education in their own language was denied alongside other non-Slavic or unrecognised Slavic nations of Yugoslavia, as the kingdom only recognised the Slavic Croat, Serb, and Slovene nations as constituent nations of Yugoslavia, while other Slavs had to identify as one of the three official Slavic nations while non-Slav nations were only deemed as minorities.