Two years before the atomic attacks on Hiroshima and Nagasaki helped bring a quick end to hostilities in the summer of 1945, U.S. planners began work on Operation Downfall, codename for the Allied invasions of Kyushu and Honshu, in the Japanese home islands. While other books have examined Operation Downfall, D. M. Giangreco offers the most complete and exhaustively researched consideration of the plans and their implications. He explores related issues of the first operational use of the atomic...