The US wasn't invaded during the cold war. Pearl harbour was never invaded either, only bombed. And guerrilla warfare only works in defending an area, not invading another country. Most of american war history is the US invading areas around us, not far off countries invading us. And the times we were attacked from forign countries, they normally had a base in the area. So I am really not sure what you are talking about.

Yea and terrorists in south and centeral america abducts something like 20 times as many people, as middle eastern countries. Yet no one cares about them, do they? Besides, our huge military isn't used for saving people most of the time.

And no war isn't good for the economy. War is part of what is causing our huge debt and is a large part of what is destroying our economy at the moment. In fact, we will soon go bankrupt as a country, unless we stop the wars that are doing so much damage to our economy.