Before the German invasion in the Soviet Union, there had not been any resistance in Vardar Banovina. At the start of World War II, the Comintern supported a policy of non-intervention, arguing that the war was an imperialist war between various national ruling classes, but when the Soviet Union itself was invaded on 22 June 1941, the Comintern changed its position. The German attack on the Soviet Union sparked the rage of the Communists in Bulgaria. The same day the BCP spread a brochure among the people urging "To hinder by all means the usage of Bulgarian land and soldiers for the criminal purposes of German fascism". Two days later, on 24 June, the BCP called for an armed resistance against the Wehrmacht and the Bogdan Filov government. After that, and when already months ago Yugoslavia was annexed by Axis Powers, Macedonian Communist partisans, which included Macedonians, Aromanians, Serbs, Albanians, Jews and Bulgarians had begun organizing their resistance. The First Skopje Partisan Detachment was founded and had been attacked Axis soldiers on 8 September 1941 in Bogomila, near Skopje. The revolt on 11 October 1941 by the Prilep Partisan Detachment is considered to be the symbolic beginning of the resistance. Armed insurgents from the Prilep Partisan Detachment attacked Axis occupied zones in the city of Prilep, notably a police station, killing one Bulgarian policeman of local origin, which led to attacks in Kruševo and to the creation of small rebel detachments in other regions of North Macedonia. Partisan detachments were formed also in Greek Macedonia and today's Bulgarian Macedonia under the leadership of Communist Party of Greece and Bulgarian Communist Party.