KEY STAGE 3 HISTORY THE ATOM BOMB INTERACTIVE HIROSHIMA, NAGASAKI; was dropping the atomic bomb necessary?

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66  In 1931, the Japanese military leaders decided to conquer Manchuria.  Japan hoped that the extra resources would make them less reliant on Western trade.  They moved quickly to gain control. The Manchurian government was powerless.  They set up a government and renamed Manchuria, Manchukuo. Manchuria Korea Japan China USSR  In 1910, Japan controlled Korea.  Japan then invaded more of China from 1937 onwards In the 1930s, Japan became more aggressive as it looked to build an empire in the Asia-Pacific region. The influence of the Japanese army in the government made it more likely that Japan would take an aggressive path. Japan first looked to a weak China for more resources and living space for its growing population. The Japanese army march through a Chinese village as they continued their invasion of China. Japanese soldiers defeat the Chinese and take control of Manchuria.

BOMB TYPE 1 Gun-triggered type They called this bomb ‘Little Boy ’. It had a 14.5-kilotron yield. (equal to 14,500 tons of TNT) The simplest way to bring the subcritical masses together is to make a gun that fires one mass into the other. BOMB TYPE 2 Implosion-triggered type They called this bomb ‘Fat Man’ It had a 23-kilotron yield. The implosion devise is made up of a sphere of U 235 and PL 239. When the bomb is detonated the fission reaction take place and the bomb explodes.implosion 18 Key Stage 3 History The Atomic Bomb Interactive The aim of the Manhattan Project was to make two different types of nuclear weapons; the uranium enriched large fission bomb and a more complicated plutonium bomb. During the project to develop the bomb, three young American lives were lost. The Little Boy Fat Man

Nagasaki Hiroshima Tokyo JAPAN The “Little Boy” detonated over Hiroshima on 6 August It was 28 inches in diameter and 120 inches long. The “Fat Man” detonated over Nagasaki on 9 August It was 5 feet in diameter and 10.6 feet long. Operation Olympic [Planned] Operation Coronet [Planned] Key Stage 3 History The Atomic Bomb Interactive Japan Surrenders On 6 August 1945, a B29 Bomber called Enola Gay dropped its atomic bomb on the city of Hiroshima. Despite the horror caused by the bomb, the Japanese did not surrender. They wanted guarantees about the protection of their Emperor. On 9 August, the United States dropped an atomic bomb on Nagasaki. Even this did not bring an end to the war. Finally, on 15 August, V.J. Day, the Japanese Emperor Hirohito announced the end of the war.V.J. Day 30 Colonel Paul W. Tibbets poses with members of the Enola Gay's ground crew on Tinian Island.