Decision to Use the Atomic Bomb: Key Points

Decision to Use Atomic Bomb

  • Discussed in February 1947 by Henry L. Stimson.

  • Context: Decision made in August 1945 for bombing Hiroshima (August 6) and Nagasaki (August 9).

  • Objective: To end the war with Japan and force surrender.

Historical Context

  • Atomic energy first considered in 1941; research committee formed under President Roosevelt.

  • Stimson involved in atomic bomb policy until resignation in September 1945.

Development of the Atomic Bomb

  • Significant progress made by mid-1945, with a test explosion scheduled at Alamogordo, New Mexico.

  • Policy: Rapid development of atomic weapon to ensure it was first developed by the U.S. and not Germany.

Strategic Considerations

  • Military objective was the complete destruction of Japan's military power.

  • Intelligence estimates suggested Japan still had over 5 million troops capable of fighting.

  • Alternate plans to push for surrender included conventional bombing and planned invasions, estimated to cause over a million U.S. casualties.

Recommendations for Use

  • Interim Committee recommended use of atomic bomb without prior warning for effective military use.

  • Concerns: Demonstrations or warnings would risk effectiveness and sow uncertainty about bomb reliability.

Justifications for the Bomb's Use

  • U.S. believed immense destruction would shock Japan into surrender.

  • Surrender negotiations considered with a warning that promised destruction if resistance continued.

  • Positive effects of the bomb versus potential costs of continued warfare.

Results and Reflections

  • Bombing led to Japanese surrender on August 10, based on the terms of the Potsdam Declaration.

  • Stimson reflects on the bomb's use as a necessary evil to avoid higher casualty rates and prolonged war.

  • Asserted the importance of learning from the destructive capacity of nuclear weapons for future peace efforts.