>>212988562>USSR never invaded China,wtf?https://en.wikipedia.org/wiki/Sino-Soviet_conflict_(1929)
https://en.wikipedia.org/wiki/Soviet_invasion_of_Xinjiang
There are other border conflicts in the 20s and 30s but these 2 resulted in annexation territory.
I won't be reading any of your replies because you couldn't be bothered to take 10 seconds to look it up before denying it. You don't have the mental capacity to discuss this subject (and neither do the anons citing the WW2 Manchuria operation).