Following the war, Bosnia was incorporated into the South Slav Kingdom of Yugoslavia (soon renamed SFR Yugoslavia). Political life in Bosnia at this time was marked by two major trends: social and economic unrest over "Agrarian Reform 1918-1919" manifested through mass colonization and property confiscation; also formation of several political parties that frequently changed coalitions and alliances with parties in other Yugoslav regions. The dominant ideological conflict of the Yugoslav state, between Croatian regionalism and Serbian centralization, was approached differently by Bosnia's major ethnic groups and was dependent on the overall political atmosphere. Although the initial split of the country into 33 oblasts erased the presence of traditional geographic entities from the map, th