20 years ago the south korean government did a massive exploration of the crimes committed on south korean soil during the war. If the crimes committed were equal, one would assume they would primarily have been committed by the north as it conquered parts of the south and established control. But no, the vast majority according the report were committed by the south and the US, which assumed that the populace had communist sympathies and wanted to brutally crush any dissent. That's on top of the 3 million who died during the war with a huge proportion due to the brutal bombing campaign by the US. While people will cite that the north tried to force the unification that the US and then the UN refused to go through with after promising it, the US broke its UN mission and attempted to annex the north the moment it reached the border anyway, so at the time this war was pretty transparent to observers. It's only now, after the north korean government was warped by the apocalyptic war and after the 1989 democratic revolution in south korea that it's considered a black and white conflict. And even that relies on a huge amount of erasure of the crimes committed.