[3] Four heavy artillery batteries and twelve reserve divisions—Sumadijska, Ibarska, Dunavska, Sremska, Drinska, Cerska, Bosanska, Vrbaska, Unska, Lička, Hercegovačka and Dinarska—were also attached to the Supreme Command.

On the first day of the war, it ordered the capture of Rijeka (Fiume) from the Italians, but owing to disorders in the 4th Army this command was rescinded.

[8] On 13 April, Simović transferred the Supreme Command to Armijski đeneral Danilo Kalafatović and ordered him to seek an armistice.

Despite being a prisoner of war, Kalafatović authorised his deputy chief of staff, Radivoje Janković, to sign an armistice and unconditional surrender with the Axis, effective at noon on 18 April.

[3] In June 1942, Draža Mihailović, leader of the Chetniks in Yugoslavia, was appointed Chief of Staff of the Supreme Command by the Yugoslav government-in-exile.