[FireFly]

The Japanese were known for their kamikaze approach to war. It wasn't just the planes that did it, all Japanese soldiers had that attitude. For the life of me I can't remember the name of the Japanese island outpost the US was forced to take, but even when it was long clear that the Japanese government was not sending further supplies, the soldiers there still held out to the point that when they finally surrendered, there were only something like 15 soldiers remaining.

If the US did not drop the atomic bomb, they would have had that same attitude for quite a while and the war likely would have lasted for months longer with thousands more US casualties. By that time the world was sick of the war and it needed to end.