When news of the atomic bombings came and then the Japanese surrender, he said that he and all the other sailors, soldiers, and Marines felt their death sentences had been commuted. President Truman's decision save millions of American and Japanese lives. There can be NO argument on this fact.
When I was in the Navy around the Vietnam time I went to Boat Group Officer school at the amphib base in San Diego. The chief running the class said my chances of surviving one opposed landing in WW II were 3 out of 10. If you know statistics it drops to less than one out of ten for two assaults.