The Cvetković–Maček Agreement, also known simply as the Sporazum in English-language histories, was a political compromise on internal divisions in the Kingdom of Yugoslavia. It was settled on August 26, 1939, by Yugoslav prime minister Dragiša Cvetković and by Vladko Maček, a Croat politician. The agreement established the Banovina of Croatia, with boundaries drawn to include as many ethnic Croats as possible. This effectively created within unitary Yugoslavia an autonomous Croatian sub-state, a demand of Croat politicians since the 1918 founding of the Kingdom of Serbs, Croats and Slovenes (Yugoslavia). The Banovina later provided a model for eventual post-war constitutional arrangements in Federal Yugoslavia (1943–1945).

The Croatian Peasant Party is an agrarian political party in Croatia founded on 22 December 1904 by Antun and Stjepan Radić as Croatian Peoples' Peasant Party (HPSS). The Brothers Radić believed that the realization of Croatian statehood was possible within Austria-Hungary, but that it had to be reformed as a Monarchy divided into three equal parts – Austria, Hungary, Croatia. After the creation of Kingdom of Yugoslavia in 1918, Party requested for the Croatian part of the Kingdom to be based on self-determination. This brought them great public support which culminated in 1920 parliamentary election when HPSS won all 58 seats assigned to Croatia.