Yes
Not during the cold war.
Yes but i dont know the reason
The atomic bombs were used to stop a war that the US did not start. It was a last ditch effort to end a terribly bloody war against a country that attacked the US without warning. It could have been avoided any time had Japan 1) not attacked the US, or 2) had surrendered when Germany did. The second bomb could have been avoided had Japan simply surrendered after the first nuclear bomb instead of pursuing the course of insanity that they did.
The US Civil War was delayed by the Missouri Compromise, but not avoided,
Thy claimed if the US declared war on Germany then Britain would join in the struggle. This is how the US avoided war with mGreat Britain.
Possibly, however there was no International body available to appeal to for a fair shake for Cuba.
more people could have fought for abolition. And we could have made peace with them.
No, currently the US and Japan are allies.
By diplomacy
the US is most responsible for the quick rebuilding of Japan Japan and the US were very close in the cold war and still are
well the rest of the world was already at war, but japan feared that we would attack them, so they bombed pearl harbor before we could attack them
After Japan attcked Pearl Harbor we declared war of Japan, and Germany.