Beginning of the twentieth century brought great challenges, great sacrifices and great victories Serbian people. Political and economic conflict with the Austro - Hungarian empire , the wars with Turkey and Bulgaria, and finally the First World War brought a great victory and at the same time new challenges. The creation of the Kingdom of Serbs, Croats and Slovenes was supposed to bring peace deadbeat Serbian people. That, however, did not think the new citizens, notably the Croats, but some minorities (Albanians, Hungarians, etc.). Though defeated in war, in peace they quickly turned against the Serbs, although their rights have been equal to or greater than those enjoyed Serbian people. In addition, one new group, the Communist Party of Yugoslavia, glorified the anti-Serbian and conducted many terrorist actions. Therefore, the period from the 1919th until in 1929. Age was infused with political conflicts and crises and parliamentary government. Beginning dictatorship was an attempt to calm this situation with a significant share of the King. There have also been forming unit’s administrations - duchies, which were supposed to mitigate inter-regional differences. While people in most, had a negative attitude towards these changes, after the death of King Alexander policies, integral Yugoslav abandoned.