 The NDH had a program, formulated by Mile Budak, to purge Croatia of Serbs, by "killing one third, expelling the other third and assimilating the remaining third".The main targets for persecution were the Serbs, with approximately 330,000 were killed.The anti-fascist communist-led Partisan movement, based on pan-Yugoslav ideology, emerged in early 1941, under the command of Croatian-born Josip Broz Tito, spreading quickly into many parts of Yugoslavia.