How did Truman justify using the bomb?

Answer 1

President Harry S. Truman justified the use of atomic bombs on Hiroshima and Nagasaki primarily by arguing that it would hasten the end of World War II and save countless lives. He believed that a conventional invasion of Japan would result in massive casualties for both American forces and Japanese civilians. Truman also emphasized the importance of demonstrating American military power, particularly to the Soviet Union, in the post-war context. Ultimately, he framed the decision as a necessary measure to achieve a swift and definitive victory.