China invaded Vietnam in 1979. In response to Vietnam invading Cambodia, to be fair. But that's still an invasion in my book.
And Vietnam's invasion of Cambodia was well justified, as far as these things go. Pol Pot's cross border raids and ongoing genocide of Vietnamese (and other) civilians required a response (see the Ba Chúc massacre).
And Vietnam's invasion of Cambodia was well justified, as far as these things go. Pol Pot's cross border raids and ongoing genocide of Vietnamese (and other) civilians required a response (see the Ba Chúc massacre).