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In 1945, what concern did the Allies have about invading the Japanese mainland with ground forces?
They were worried they did not have enough soldiers.
They were worried there would be too great a loss of life.
They were worried the Japanese were developing an atomic bomb.
They were worried the Japanese had a stronger fleet in mainland ports.

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Answered by GPT-5 mini AI
They were worried there would be too great a loss of life.

Allied planners expected an invasion (Operation Downfall) to produce extremely high casualties — both Allied and Japanese civilians and soldiers — because of Japan’s planned fierce defense, mobilization of civilians, and kamikaze attacks. That prospect was a major factor in considering alternatives (atomic bombs, Soviet entry) to force surrender.