Okinawa has just been invaded. The fighting is the worst ever. The invasion is supported by a vast fleet against which the Nipponese have launched everything they have. The Yamato came after them, her eighteen-inch guns at the ready, carrying only enough fuel for a one-way voyage. But the cryptanalysts of the U.S. Navy intercepted and decrypted her orders and the great ship was sent to the bottom with 2,500 men. The Nipponese have launched the first of their Floating Chrysanthemum assaults against the invasion fleet: clouds of kamikaze planes, human bombs, human torpedoes, speedboats packed with explosives.