Not this century. I was going by this list here for what counts as invasions: https://en.wikipedia.org/wiki/List_of_invasions_in_the_21st_century https://en.wik

Not this century. I was going by this list here for what counts as invasions: https://en.wikipedia.org/wiki/List_of_invasions_in_the_21st_century https://en.wikipedia.org/wiki/List_of_invasions_in_the_21st_... and counted 3 or more invasions as prolific invaders. But your parent is absolutely correct that China and North Korea also regularly engage in wars, though what counts as war and what counts as skirmishes is up for debate, I would count https://en.wikipedia.org/wiki/2020%E2%80%932021_China%E2%80%93India_skirmishes https://en.wikipedia.org/wiki/2020%E2%80%932021_China%E2%80%... as a war (I had just forgotten about it), ditto https://en.wikipedia.org/wiki/2010_Yeonpyeongdo_bombardment https://en.wikipedia.org/wiki/2010_Yeonpyeongdo_bombardment That however just makes my point stronger.