The prisoner exchange that ended the Korean War was delayed two years by one unexpected problem: tens of thousands of Communist POWs refused to go home.
When Korean War armistice talks began in 1951, negotiators expected prisoner exchange to be a routine formality — each side would return captured soldiers after signing. Instead, the POW question nearly wrecked the entire negotiation and prolonged the fighting for two more years. The problem: a large fraction of the Chinese and North Korean prisoners held by UN forces flatly refused to be repatriated to Communist countries.
The numbers were embarrassing for Mao and Kim. Of the roughly 170,000 Communist prisoners held by UN forces, about 50,000 initially said they would refuse repatriation — they preferred to go to Taiwan or South Korea rather than return home. For Communist governments whose ideology insisted that workers' states were universally preferred over capitalist ones, having tens of thousands of prisoners reject return was an ideological catastrophe they could not accept.
The Communist negotiating position was firm: the Geneva Convention required return of all prisoners regardless of their wishes. The UN position was equally firm: forcing prisoners to return against their will was morally unacceptable. The deadlock was total. While negotiators argued, fighting continued and thousands more soldiers died on both sides. The POW issue alone added at least eighteen months to the war.
In the camps themselves, the situation was chaotic. Anti-Communist prisoners murdered Communist loyalists. Pro-Communist prisoners seized control of entire camps and held American guards hostage. Prisoners rioted, went on hunger strikes, and produced propaganda materials. The camps became small-scale reflections of the ideological war being fought outside their wire.
The resolution came only after Stalin's death in March 1953. The new Soviet leadership signaled flexibility, and the Chinese followed. A neutral commission — India, Poland, Czechoslovakia, Sweden, and Switzerland — would take custody of non-repatriating prisoners and allow representatives from both sides to 'explain' the situation to them. Prisoners could then choose freely.
Operation Big Switch began August 5, 1953. The UN returned 75,823 prisoners; the Communist side returned 12,773 UN personnel. The final count of non-repatriates was striking: 21,839 Communist soldiers chose to remain in the West. Twenty-one Americans and one Briton chose to stay with Communist forces — triggering intense scrutiny, congressional investigations, and the word 'brainwashing' entering the American vocabulary.
The POW crisis had lasting consequences beyond Korea. It shaped US Army thinking about prisoner conduct, leading directly to the Code of Conduct that American military personnel follow to this day. It also introduced 'brainwashing' — the idea that captured soldiers could be psychologically manipulated into betraying their country — as a Cold War anxiety that influenced everything from CIA research programs to popular culture for decades.