Final answer:
Truman decided to use the atomic bomb to end the war quickly, demonstrate American power, and preserve American lives.
Step-by-step explanation:
Truman decided to use the atomic bomb for several reasons:
- Ending the war quickly: Truman believed that using the bomb would force Japan to surrender, thus avoiding a prolonged and costly invasion of Japan that would result in massive casualties.
- Show of power: Truman wanted to demonstrate the United States' military strength to the Soviet Union, sending a message about American dominance in the post-war world.
- Preserving American lives: Truman wanted to bring the war to an end without risking the lives of more American soldiers.
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