Upon returning to Mongolia in January 1939, he was appointed head of the Political Council and Deputy Supreme Commander-in-Chief of the Mongolian People's Revolutionary Army. He took part in the Battles of Khalkhin Gol in 1939 and also participated in the hostilities of the Soviet–Japanese War. During the battles, he, in his position as Corps Commissar of the MPRA, was Marshal Georgy Zhukov's deputy in command of the Mongolian cavalry. Towards the end of the war, he also served with General Issa Pliyev in the Soviet-Mongolian Cavalry-Mechanized Group of the Transbaikal Front. In 1944, he became one of the first generals of the Mongolian Army.