 He came into contact with the "Military Revolutionary Council" of the Makhnovists, on behalf of whom he organized and held a congress of rebel groups in Pologi on January 3-4, 1919.According to Belash’s report, the congress decided to replace the detachments with regiments, streamlined supplies, and medical affairs, and chose the Operational Headquarters led by Belash.Since that time, Belash became one of the leading figures of the Makhnovist movement, he was of the part that was most tolerant of the Soviet regime and advocated close alliance with it to combat the white counter-revolution.