For what Reason Did President Truman Decide to Use Atomic Weapons to End the War in the Pacific?

Truman used the atomic bomb to shortening the war in the Pacific and to save the lives of Americans and to keep
American public opinion positive. Truman's defense in using atomic weapons was that it protected and saved
thousands of American lives and money that would have had to been used to fight the war.
I disagree with President Truman's reasoning in dropping an atomic weapon. I feel that Truman could have used different tactics to get the Japanese to surrender. By dropping an atomic bomb the United States killed thousands of innocent civilians. …