List of the Pros of Dropping the Atomic Bomb 1. It stopped the war from continuing. The estimated casualty count for a Japanese mainland invasion was above 500,000 on the Allied side alone. By dropping the bomb, fewer people were killed than what would have likely happened otherwise. 2. It served as a deterrent. At 2:45 a.m. on Monday August 6, 1945, three American B-29 bombers of the 509th Composite Group took off from an airfield on the Pacific island of Tinian, 1,500 miles south of Japan. Colonel Paul Tibbets piloted the lead bomber, "Enola Gay," which carried a nuclear bomb nicknamed "Little Boy.".