During World War II the Comintern sent him back to Vardar Macedonia (being then part of the Kingdom of Yugoslavia under the name 'Vardarska Banovina') to serve as a Secretary of the Macedonian Regional Committee of the Yugoslav Communist Party (YCP) since 1940. After the Bulgarian takeover of Vardarska Banovina in April 1941, the Vardar Macedonian communists fell in the sphere of influence of the BCP under Sharlo's leadership.
During World War II, the Comintern dispatched him back to Vardar Macedonia (which was part of Yugoslavia under the name 'Vardarska Banovina' at that time) to serve as a Secretary of the Macedonian Regional Committee of the Yugoslav Communist Party (YCP) since 1940. Following the Bulgarian takeover of Vardarska Banovina in April 1941, the Vardar Macedonian communists came under the influence of the BCP led by Sharlo.