During the Soviet–Japanese War, Parsegov was the chief of artillery of the 2nd Far Eastern Front. The troops led by him, along with troops from other fronts, crushed the deeply echeloned fortifications of the Japanese and defeated the Kwantung Army. He skillfully directed the artillery of the front to force the Amur and Ussuri Rivers. His troops participated in the liberation of Harbin and other Chinese cities and towns, as well as southern Sakhalin and the Kuril Islands.