work. Despite its activities, including a petition for the secession of Serb-majority districts, the movement did not receive widespread support among Serbs in Croatia. In the 1940 Croatian local elections, parties and lists supported by the movement performed poorly compared to the largely-Serb Independent Democratic Party, a member of the governing coalition together with the HSS. In 1941, there were around 300 Chetnik and similar organizations in Bosnia and Herzegovina and around 200 in Croatia. World War II On 6 April 1941, Nazi Germany, Italy, and Hungary invaded Yugoslavia. Yugoslavia capitulated on 17 April, and the country was partitioned by the Axis powers. In northern Bosnia, a group of officers and soldiers of the Royal Yugoslav Army, led by Colonel Draža Mihailović, refused to surrender and took to the hills. They moved to Ravna Gora in Serbia where they set up their headquarters. While they did not originate from interwar Chetnik organizations, upon establishing a command post, they designated themselves as the "Chetnik Detachments of the Yugoslav Army". Their name was later changed to "Yugoslav Army in the Fatherland", but were commonly known as the Chetniks. Pećanac also raised guerrilla units, but did not engage the Axis forces, and reached agreements in August with both the Serbian puppet government and the German authorities. His forces did not cooperate with Mihailović. Mihailović undertook a military and political structuring of the movement. In August 1941, he formed the Chetnik National Committee as an advisory body. It included former politicians and members of organizations such as the Serbian Cultural Club, with a Greater Serbian ideological orientation. Outside Serbia, various independent groups were formed that shared the same ideology as the Chetniks. These groups took part in armed uprisings against the Ustashe-led Independent State of Croatia (NDH), an axis puppet state established in occupied Yugoslavia, in the summer of 1941. The uprisings were a reaction to the genocidal policy implemented by the Ustashas against Serbs. Mihailović sought to assume command of the insurgents and integrate them in the Chetnik movement. In the first months of the war, the Chetniks cooperated in their anti-Axis activities with the communist-led Yugoslav Partisans under Josip Broz Tito, with whom they later came into conflict. In September, Mihailović made first contacts with the Yugoslav government-in-exile, which embraced the Chetnik movement and its main objectives as a basis of post-war Yugoslavia. The Serbian-dominated regime in Yugoslavia promoted Greater Serbian and