The Battles of Khalkhin Gol, known in Japan as the Nomonhan Incident after Nomonhan Burd Obo, were the decisive engagements of the undeclared Soviet–Japanese border conflicts which involved the Soviet
Japanese infantrymen near wrecked Soviet armored vehicles, July 1939
Mongolian cavalry in the Khalkhin Gol (1939)
Mongolian troops fight against a Japanese counterattack on the western beach of the river Khalkhin Gol, 1939
Japanese soldiers cross the Khalkhin Gol
Outer Mongolia — officially the Mongolian People's Republic — was ruled by the communist government of Khorloogiin Choibalsan during the period of World War II and had close links with the Soviet Unio
A detail from Ulaanbaatar's Zaisan Memorial
A World War II memorial in Ulaanbaatar, featuring a T-34/85 tank.