What would you do if the United States was invaded? What would you do if the invaded forces actually toppled our government?
silverwhisper- A single nation may not have the forces required, but a group would. The Brits actually could have successfully invaded us then since the only real victory we had was after the war was technically over.
beyondtheveil- There really isn't an alternative, unless you would consider being a traitor one. But that isn't an option for me and hopefully most Americans.