Operation Olympic, the planned first phase of the invasion of Japan, was scheduled to begin on November 1, 1945.
Olympic was the proposed Allied assault on southern Kyushu. It was intended to capture territory and airfields that could support Operation Coronet, the planned second phase against the Kantō Plain near Tokyo. The two operations were collectively known as Operation Downfall.
The planned date is sometimes confused with March 1, 1946, which was the tentative start date for Coronet. Olympic came first because Allied planners expected to use Kyushu as a forward base before attacking Honshu. The plan included landings at several locations and a huge naval force assembled from Allied resources.
Japanese commanders anticipated the likely invasion zones and developed Operation Ketsugō to defend Kyushu. American and Japanese planners both expected the fighting to be extremely costly, but casualty estimates varied widely and were never tested in combat.
Japan's surrender made the schedule irrelevant. The atomic bombings of Hiroshima and Nagasaki, the Soviet entry into the war against Japan, and political decisions in Tokyo led to surrender before either Downfall phase began.