On May 25, 1945, while American and Japanese forces on Okinawa were locked in bitter struggle, the U.S. Joint Chiefs of Staff sent out plans for an amphibious invasion which would subjugate Japan. "Operation Olympic" was to seize Kyushu, while "Operation Coronet" was to strike directly against the Tokyo area.
Westheimer's meticulously researched novel about this plan startled readers in the 1970s.