How far was the use of atomic bombs on Japan in August 1945 justified by military necessity? Explain your answer. [40]

This question asks you to evaluate whether the atomic bombings of Japan in August 1945 were justified by military necessity. This is one of the most debated questions in modern history, and a strong answer must present both sides of the argument with specific evidence.

Evidence supporting the military necessity argument:

• The Battle of Okinawa (April to June 1945) resulted in over 12,000 American deaths, more than 100,000 Japanese military casualties, and tens of thousands of civilian deaths. Military planners estimated that an invasion of the Japanese home islands (Operation Downfall) could cost hundreds of thousands of American casualties and potentially millions of Japanese casualties.
• Japanese military leaders had shown no willingness to surrender unconditionally. The military code of bushido and official policy discouraged surrender, as demonstrated by kamikaze attacks, which became increasingly frequent in 1945.
• Japan was preparing for a determined defence of the home islands, with millions of soldiers and civilians mobilised under the Ketsu-Go strategy. Civilians were being trained to fight with improvised weapons.
• President Truman and his advisers (particularly Secretary of War Henry Stimson) calculated that using the atomic bombs would shorten the war, save American lives, and potentially save Japanese lives that would be lost in an invasion.
• The bombs did produce rapid results: the bombing of Hiroshima on 6 August 1945 was followed by the bombing of Nagasaki on 9 August, and Japan announced its surrender on 15 August.

Evidence challenging the military necessity argument:

• By August 1945, Japan was already close to defeat. Its navy was destroyed, its cities were being devastated by conventional firebombing (the Tokyo firebombing of 9-10 March 1945 killed approximately 100,000 people), and a naval blockade was cutting off food and raw material supplies.
• The Soviet declaration of war on Japan on 9 August 1945 may have been equally or more important in persuading Japan to surrender than the atomic bombs. The Soviet invasion of Manchuria destroyed Japan's largest remaining army and eliminated any hope of Soviet mediation for a negotiated peace.
• Some historians argue the bombs were partly motivated by a desire to demonstrate American power to the Soviet Union as Cold War tensions were emerging, rather than purely by military necessity.
• Japan had been seeking peace through Soviet diplomatic mediation before the bombs were dropped, though it was unwilling to accept unconditional surrender. Some critics argue that modifying the surrender terms (guaranteeing the Emperor's position) could have ended the war without the bombings.
• The bombings killed approximately 70,000 to 80,000 people immediately at Hiroshima and 40,000 at Nagasaki, with many more dying later from radiation sickness and injuries. The majority of victims were civilians.

Reaching a judgement: Military necessity was a genuine factor in the decision, and the projected casualties of an invasion were a serious concern. However, the extent to which the bombs were the primary reason for Japan's surrender (as opposed to Soviet entry) remains contested. A strong answer would acknowledge that multiple factors influenced the decision and that pure military necessity does not fully explain why two bombs were used in quick succession or why alternatives were not pursued more vigorously.

Mark scheme guidance:

• Level 5 (33-40): Balanced evaluation of both sides of the debate, with precise evidence, engaging with historical interpretations and reaching a sustained judgement.
• Level 4 (25-32): Good analysis of both arguments with relevant evidence, but the engagement with competing interpretations may be less developed.
• Level 3 (17-24): Some explanation with evidence, but may present only one side or lack depth in counter-arguments.
• Level 2 (9-16): Descriptive narrative of the bombings without sustained evaluation of whether they were justified.
• Level 1 (1-8): General statements with little specific evidence.

Exam tip: This is a question about historical interpretation, not about your personal moral opinion. Present the evidence and arguments on both sides, and base your judgement on the historical evidence rather than on emotional reaction.