When the U.S. Marines landed on Iwo Jima, they expected to secure it within a few days. No one had anticipated Japan's determination to defend the island to the last man. Morison describes the Japanese defense system of camouflaged rifle pits and fortified gunning positions that held the Allies at bay and the heavy and continuous cover of naval gunfire that prevented even greater losses. As it was, the securing of Iwo Jima cost the United States more casualties than had been incurred in taking any other island in the Pacific. On Okinawa, the conflict stretched over six long, bloody months.

As land forces struggled for every inch they took on the islands, the U.S. Navy faced the desperate fury of the kamimaze corps and its harvest of flaming terror: explosions, burning and flooded ships, searing injuries and death. Fierce weather, logistical complexities, Japanese submarines, and the unexpected death of President Roosevelt also took their toll.

Morison concludes his epic account with the final skirmishes of the war, the fateful decision to drop the atomic bomb, and the delicate negotiations leading to Japanese surrender.