"Rudolph Rummel estimated that the North Korean Army executed at least 500,000 civilians during the Korean War with many dying in North Korea's drive to conscript South Koreans to their war effort. Throughout the conflict, North Korean and Chinese forces routinely mistreated U.S. and UN prisoners of war. Mass starvation and diseases swept through the Chinese-run POW camps during the winter of 1950–51. About 43 percent of all U.S. POWs died during this period. In violation of the Geneva Conventions which explicitly stated that captor states must repatriate prisoners of war to their homeland as quickly as possible, North Korea detained South Korean POWs for decades after the ceasefire. Over 88,000 South Korean soldiers were missing and the Communists' themselves had claimed they had captured 70,000 South Koreans."

https://en.wikipedia.org/wiki/List_of_war_crimes#North_Korea...

The korean war was a shitshow on both the south and north korean sides but the south koreans were still better and the US was still on the right side.