This is just a basic answer, but after the attack on Pearl Harbor they were pretty upset. They began to attack Japan, and even to used nuclear weapons. They warned Japan about this but they didn't believe them. It was a hard fought war but the U.S won.
People can't save themselves, that's why we have to rely on God, He's the only one who can save anybody.
Was to give the traditional rights of citizens of England.
The main reason why the US joined the war was because multiple attack on passenger and merchant ships with submarine attacks .The final straw was when the RMS Lusitania by a German u-boat going to Liverpool England .
