 The Chetniks helped to impose a rule of terror over the territory of Kosovo and Macedonia.Meštrović quotes Vaso Čubrilovićs "Ways of Expulsion" where he states that Serbia could use Chetniks to continue the terror and expulsion of Albanians.Following the end of World War I and the formation of the Kingdom of Serbs, Croats and Slovenes, pro-Bulgarian sentiment was rife in Macedonia, which was referred to as South Serbia by the Belgrade government.