As prime minister, Bozhilov worked closely with the Germans, virtually becoming their puppet as World War II raged. Essentially the only major issue on which he clashed with the Nazis was their demand for Bulgaria’s government to deport the country’s Jews to extermination camps, which Bozhilov refused to do.[3] In June 1944, at which time the Axis war effort was rapidly deteriorating, Bozhilov resigned as prime minister and returned to the Bulgarian National Bank, once again becoming its governor. In September 1944, the Soviet Union declared war on Bulgaria and invaded it, giving Communist partisans the opportunity to overthrow Prime Minister Konstantin Muraviev and replace him with Kimon Georgiev.