セルビア救国政府
Aćimović's puppet government was replaced by another puppet government, the Government of National Salvation, headed by former general Milan Nedić. In this government, Aćimović served as minister of the interior. He was sympathetic toward the Chetniks of Draža Mihailović and maintained close contact with Mihailović. The Germans suspected that Aćimović warned Mihailović of the launching of Operation Mihailovic, which was conducted over 6–7 December 1941. The warning, apparently given the day before the offensive began, enabled Mihailović to escape. In January 1942, he visited Serbian prisoners in the Osnabrück concentration camp in Nazi Germany.