Ehhh the Korean war is complicated. It started with Japan invading Korea and attempting to erase their history and culture. (Worth noting that America gave them the green light on this). After WW2, Korea was divided and backed by US/USSR interests on either side. It was a shitshow with everyone disagreeing how things should be run. Eventually North Korea did invade the South, though, so I guess this meme still applies. But even that fact is unclear - they claim it was retaliatory. Who knows.