Across the ocean, a different world existed. America in 1944 was a nation working in perfect, disciplined frenzy. Detroit alone produced more planes than entire continents. Shipyards hammered out eight million tons of steel hulls a year. Women welded bombers. Teenagers harvested wheat. Families rationed sugar and rubber without complaint. War bonds were bought with a kind of patriotic reverence. And in the middle of all this industry and determination, the United States quietly built the largest humanitarian POW system the world had ever seen—though hardly anyone outside military circles knew it.