@ Vyxn
I have seen your reply but not an answer to my question, what domestic tyranny have armed civilians prevented since US independance that wasn't halted by law enforcement?
And yes Poland and France were taken over very fast same as with the Netherlands and most of Europe for that matter however Germany had changed how wars were being fought it is called Blitzkrieg, no country in Europe was prepared for that. Also the superior arms of the Germans added to that. As mentioned by Ethes the Dutch were not even given a chance after Rotterdam was bombed to hell (and I mean hell as the center of town was a firestorm) they had to surrender or Amsterdam would be next. Look it up the pictures of Rotterdam look somewhat the same as Hiroshima or Nagasaki
http://upload.wikimedia.org/wikipedi...jpg?uselang=nl
You mentioned the Vietnamese and Agfhans again you fail to see the simple fact that these 2 peoples were game changers to war, the VC managed to bring the entire US military to a halt, the same with the Afghans the forced the Russians to commit massive amounts of equipment and personel to a conflict which both these superpowers couldn't and didn't win. However both these peoples were ready willing and able to go far beyond what there enemies were willing to do in general as in living under ground or in caves, murdering their own populace on a whisper of disobediance.
What you also fail to see is that the US is in a position like few other countries you have NO enemies at the gate to the east you have the Atlantic, to the west the Pacific, to the north Canada and the south Mexico.
So that leaves what either the chinese going to war with the US or a lone man with a suitcase nuke neither of which will be stopped by a regular joe with a gun, the former by the military and the latter (if you are very lucky) by your law enforcement (including all spy agencies in that catagory, you know the alphabet soup people).
Enemy invasion of the US currently is almost not possible with the exception of the chinese or if the entire South American continent moves on you the logistics make it nigh on impossible unless you can dominate the air & sea between, enemy infiltration sadly is possible and almost impossible to guard against.
And lets be honest if China would invade forget about the Geneva convention or any form of humane treatment they would move in and be there till hell freezes over the only thing you could do to stop that is by going nuclear.