Final answer:
The primary reason for using atomic bombs on Japan was to force unconditional surrender, not to limit casualties.
Explanation:
Limit casualties was not a reason the U.S. used atomic bombs on Japan. The decision to use atomic weapons was primarily to force unconditional surrender and bring a swift end to World War II. Despite debates on whether the bombings were necessary, President Truman proceeded with the attacks on Hiroshima and Nagasaki.
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