The Japanese were allied with Germany. When they attacked, war was declared on between us and them. This also put us at war with their ally, germany. Italy isn't important to me. We nuked them because we didn't want to lose more american lives that we had since it was clear that the Japanese would not give up until every soldier of theirs was gone. The second nuke was fired only because they did not get the message the first time. And yes Truman did want to get back at them. But thats how things go. A good leader won't sit there and take a bullstuff surprise attack and do nothing about it. It's the same stuff with 9/11. The only problem now is that the economy is hurting and people want to get out of Iraq. And if I'm correct, France had it's ass kicked and Britain was gettin it's ass bombed.