A primary reason for Truman's decision to drop the atomic bombs on Japan was that he

The main reason was to end world war 2. The war was still going on and onl japan hasn’t surrendered. Truman decided to drop 2 atomic bombs on Japan to force them into surrendering and they did after the second bomb dropped. Many civillian lives were sacrificed to end world war 2.

answer; observing;

answer; biological;