Communication warriors in the pre–war period took part in hostilities on the Chinese–Eastern Railway (1929), near Lake Khasan (1938), near the Khalkhin–Gol River (1939), in the liberation of Western Belarus and Western Ukraine (1939), in the Soviet–Finnish War (1939–1940). The communication troops from April 1924 to June 1941 were consistently led by Nikolai Sinyavsky, Roman Longva, Alexey Aksyonov, Ivan Naydenov, Nikolay Gapich.