What was the planned U.S. operation to invade Kyushu during a possible invasion of Japan in 1945?

Operation Olympic was the planned U.S. operation to invade Kyushu during a possible invasion of Japan in 1945.

Olympic was scheduled as the first phase of Operation Downfall, the overall plan for invading the Japanese home islands. The target date was 1 November 1945, and the landing area was southern Kyushu. The operation was expected to seize airfields and establish a base for later operations.

The second phase, Operation Coronet, was planned for Honshu near Tokyo in March 1946. Japan’s surrender in August 1945 meant that neither Olympic nor Coronet took place.

These plans are often confused because Downfall was the umbrella operation, while Olympic and Coronet were its two major components. The projected invasion involved enormous military preparations and casualty estimates, but those estimates were uncertain and varied among planners.