USA HISTORY

Detailed explanation-1: -Truman’s decision was framed by his belief that the bombing of Hiroshima and Nagasaki would shorten the war and thereby save the lives of tens or hundreds of thousands of American soldiers as well as untold numbers of Japanese soldiers and citizens.

Detailed explanation-2: -In 1950, US president Harry S. Truman publicly stated that the use of nuclear weapons was under “active consideration” against Chinese targets during the Korean War. In 1953, US president Dwight D. Eisenhower threatened the use of nuclear weapons to end the Korean War if the Chinese refused to negotiate.

Detailed explanation-3: -The Man Who Survived Two Atomic Bombs Whatever the U.S. intention had been at Hiroshima and Nagasaki, Stalin certainly saw U.S. possession of the atomic bomb as a direct threat to the Soviet Union and its place in the post-war world-and he was determined to level the playing field.

Detailed explanation-4: -Such wars were unpopular and too expensive. Instead, they had to be prevented from happening in the first place. The best way to do that seemed to be to threaten to use nuclear weapons if a Communist state tried to seize territory by force. This policy came to be called: massive retaliation.