What will happen if the USA got mad, and got every Country at once?

The first thing that would happen, is that they will invade Canada, and they will be completely destroyed. Next will be Mexico, they will put up a fight and take back parts of California, but the US will still take over Mexico. Europe will see this and get involved, but the US does a counter invasion. But something unexpected will happen... Bosnia single-handedly pushes out US troops, destroys the US in another counter invasion, and ends this conflict!