50 Points Why did Truman decide to use an atomic bomb against japan
1: he wanted to punish the Japanese civilians for refusing to surrender
2: He hoped to force Hitler to surrender alive
3:he was unaware of the amount of destruction and suffering the bomb would cause
4: He hoped to avoid an invasion that would result in massive Allied casualties and firebombing had not yet forced japan to surrender

he bomb was not ready for testing before Germany unconditionally surrendered on May 7, 1945. Seeking advice, as the war in the Pacific continued, Truman authorized a group of civilian leaders and scientists to make recommendations on its use. Headed by Secretary of War Henry L. Stimson, the so-called Interim Committee decided to reaffirm the long-held policy of using the atomic bomb when it was ready.

The Interim Committee also recommended against giving the Japanese any warning or demonstrating the bomb on some uninhabited area. Committee members wanted to assure a total surprise to shock the Japanese government and people into quickly surrendering. The committee agreed that the "most desirable target would be a vital war plant employing a large number of workers and closely surrounded by workers' houses."

Explanation:

The intentional bombing of civilians had been going on for quite some time--first by the Germans and Japanese and then by the British and Americans. About 100,000 Japanese died during American fire bombing raids on Tokyo five months before Hiroshima and Nagasaki. But what made atomic bombs even more frightful were the largely unknown short- and long-term effects of radiation and their capacity for worldwide destruction.

Shortly after Hitler began World War II in Europe, physicists Leo Szilard and Albert Einstein wrote a letter to President Roosevelt. They urged him to set up a project to develop an atomic bomb, which they believed Germany was already working on. Roosevelt initiated the "Manhattan Project" in 1941. He placed General Leslie R. Groves in command of a group of scientists headed by J. Robert Oppenheimer. From the very beginning, almost everyone involved in this project believed that America would use the atomic bomb to end the war.

When Roosevelt died on April 12, 1945, Vice President Harry S. Truman became president. Unfortunately, Roosevelt had never included his vice president in discussions about the atomic bomb. Two weeks after becoming president, he was finally fully briefed about "the gadget," as General Groves called the bomb.The Interim Committee additionally concluded that using the atomic bomb to end the war would make the Soviet Union "more manageable" in the postwar world.

lend lease program was passed by congress on march 11, 1941. the president could ship weapons, food, or stuff to any country whose struggle against the axis assisted u.s. defense