I would use my cell phone to help get rid of an army that I did't want in my country as well.

I'd like to pose a scenario. The leader of a country got it in their mind that the USA had weapons of mass destruction that they will use against other countries to take innocent lives. The country says USA let us into your country, into the white house and all military bases to look for these Nuclear weapons because as history has shown us (Japan and Vietnam) you have blown up and poisoned innocent civilians that had nothing to do with the war before. No says the President this is our country and we have the right to protect our freedom. The other country says fuck you we are going to invade and we will find these weapons and over throw this evil government for the sake of the people and in the process of doing this we will use our businesses to rebuild your cities. We are doing this for the good of your people they must be freed from this lying cheating government.

In such a case would the government of the USA use what ever they had to get this invading force out of the country? I think they would and they would still believe they were good and the other country was evil.