In the closing months of World War II, Americans found themselves facing a new and terrifying weapon: kamikazes – the first men to use airplanes as suicide weapons. By the beginning of 1945, American pilots were shooting down Japanese planes more than ten to one. The Japanese had so few metals left that the military had begun using wooden coins and clay pots for hand grenades. For the first time in 800 years, Japan faced imminent invasion. As Germany faltered, the combined strength of every warring nation gathered at Japan's door. Desperate, Japan turned to its most idealistic young men – the best and brightest college students – and demanded of them the greatest sacrifice.