I would fight in a war if...

[Mr. Oysterhead]

The coastlines are far too densely populated, any sort of invasion would result in barbaric displays of collateral damage.

D-Day, it's been done before, what's to stop it from happening again? Especially since Russia is planning to put military service into its school curriculum. I would guess that if Europe was up to it, it could take down the US without many problems. Also, Canada and Mexico are the only entry points but as far as I know the southern border is terribly defended.