Editing Russian Far East (section)

====Soviet–Japanese conflicts====
{{Main|Soviet–Japanese border conflicts}}

During the [[Japanese invasion of Manchuria]] in 1931, the Soviets occupied [[Bolshoy Ussuriysky Island]], [[Yinlong Island]], and several adjacent islets to separate the city of [[Khabarovsk]] from the territory controlled by a possibly hostile power.<ref>The [[People's Republic of China]] recognized Russian possession of the eastern half of these lands in [[Complementary Agreement between the People's Republic of China and the Russian Federation on the Eastern Section of the China–Russia Boundary|the treaty of 2004]], whereas the western half then reverted to China.</ref>{{Better source needed|date=July 2023}}

Indeed, Japan turned its military attention to Soviet territories. Conflicts between the Japanese and the Soviets frequently happened on the border of Manchuria between 1938 and 1945. The first confrontation occurred in Primorsky Krai, the [[Battle of Lake Khasan]] (July–August 1938) involved an attempted military incursion of Japanese-controlled [[Manchukuo]] into territory claimed by the Soviet Union. This incursion was founded in the beliefs of the Japanese side that the Soviet Union had misinterpreted the demarcation of the boundary based on the 1860 [[Treaty of Peking]] between Imperial Russia and [[Manchu China]]. Primorsky Krai was always threatened by a Japanese invasion despite the fact that most of the remaining clashes occurred in Manchukuo.

The clashes ended shortly before and after the conclusion of [[World War II]] (see [[Soviet–Japanese War]]) when a war-weakened Japan found its territories of Manchukuo, [[Mengjiang]], [[Korea under Japanese rule|Korea]], and [[South Sakhalin]] [[Soviet invasion of Manchuria|invaded by Soviet and Mongolian troops]] (August 1945).