Did Truman really save 500,000 American live through dropping the Hiroshima atomic bomb?

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Did Truman Really Save 500,000 American Lives through Dropping the Atomic Bomb?

Total Word Count:1979

Candidate Name: Amelia Zhang

Candidate Number:00079-053

School: Beijing World Youth Academy


Table of Contents

  1. Plan of Investigation                    Pg 3
  2. Summary of Evidence                   Pg 4
  3. Evaluation of Sources                  Pg 6
  4. Analysis                             Pg 8
  5. Conclusion                           Pg 11
  6. Bibliography                         Pg 12
  7. Appendix                            Pg 14

Plan of Investigation (Word Count: 135)

This investigation will consider neither the motives nor the alternatives to the decision of dropping the atomic bombs, but focus simply on “did the decision to drop the atomic bombs save 500,000 American lives?” as claimed by Truman. To answer this question, I will evaluate the Japanese military situation in the summer of 1945, and casualty estimates for the planned invasion of Operation Downfall through casualty reports, memoranda, intelligence reports, and press documents, supplemented by books written by revisionist and orthodox historians, as well as university lectures, interviews, and documentaries. I will focus particularly on Truman’s memoirs because it provides a first hand insight to his thoughts and feelings during presidency in context; as well as the book Hiroshima in History as it is a secondary source written by award winning historians through numerous perspectives.


  1. Summary of Evidence (Word Count:591)

The military situation:

        After VE day, American allies turned their focus on the termination of the Pacific war. Japan’s military capacity was irrevocably destroyed yet showed no willingness to accept the unconditional surrender demanded at Potsdam. The strategy of naval blockade and strategic bombing undermined Japan’s ability to develop a defensive line or conduct further offensive operations. By September 1944 American forces had taken the Mariana Islands, and were in position near Japan’s mainland. Nevertheless, by June 1945 the tremendous casualties of Okinawa, where in 82 days resulted in 72,000 casualties; forced American policy makers to rethink their strategy.

Employed Strategies:

By early August, 67 Japanese cities had been heavily bombed, resulting in 500,000 deaths, and 10 million Japanese refugees. The Tokyo air raid alone saw over 84,000 killed and approximately 120,000 injured. Instead of provoking peace demands from the people it increased Japanese determination and rage. Nevertheless, the naval blockade severely undermined Japan’s internal economy with its industry on the brink of collapse; by June 1945 Japanese leaders agreed the naval blockade would cause critical food shortages during autumn. However, despite the evitable defeat, Japan was ready to fight till death. The holy status of the emperor appeared sufficient “to lead the soldier to fanatical battlefield performance, the people to extreme fortitude, all to self-destruction if necessary.” The Japanese way of war was ‘treacherous’. They used false surrender; systematized suicide through Kamikaze units and child bombers; armed teenage girls with carpenter awls, and taught farmers how to change their farm tools into weaponry.In event of a full invasion, the Japanese military had 6,983,000 armed forces; and 25 million citizens ready to defend their home country.

Operation Downfall:

Operation Downfall is the allied plan for the invasion of Japan; however it was canceled when the Japan surrendered on August 15th. It consisted of two amphibious assaults-operation Olympic and Coronet, set for November 1st 1945, and April of 1946 respectively. Operation Olympic is the invasion upon Kyushu, which would be undertaken by the 6th division, led by General Walter Krueger. After approximately 4 months later Operation Coronet will be launched by the 8th and 10th divisions, followed by the entry of the first division from Europe. On May 12th 1945, ULTRA intercepts showed that Japan had deployed 246,000 soldiers in Kyushu, U.S. analysts predicted that the total enemy strength would not exceed 350,000 combatants before the schedule invasion. However by August 2nd Japanese correctly predicted where Olympic was to take place and increased deployment to 545,000 and growing, whereas the projected U.S invasion forces were only 766,700, creating a ratio of approximately 1.4 American troops to 1 Japanese troop.

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The atomic bomb was successfully tested on June 16th, and presented Truman an alternative to the invasion. Already in June 1st the Interim Committee had recommended Truman to use the bomb, 5 days after the testing, Truman finally gave consensus, and on August 6th 1945 the first atomic bomb was dropped on Hiroshima. Approximately 80,000 people died immediately, with another 70,000 injured. On August 8th the Red Army invaded Manchuria as agreed in Potsdam, outnumbering Japanese troops by two to one, nevertheless the Soviets suffered over 24,000 casualties, and 12,000 deaths. On August 9th the second bomb was dropped on Nagasaki, yet till August 10th the ...

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