From 1939 to 1944 Arseny Semionov was in the Red Army's armored forces. He served in the Trans-Baikal and Mongolia. Party fights for Khalkhin Gol. From the first day of Great Patriotic War he participated in the battles. He rose from private to commander of a tank battalion. He was wounded five times, marked by military awards, including the Order of the Red Star, Order of the Patriotic War the first and second degrees, and medals. In 1944, Arseny Semionov was discharged on the injury.