First, I should specify that I'm not trying to be argumentative or to troll, but rather to propose some items for thought.
Understood.
So you are essentially saying that, it doesn't matter what sort of technology or how "deadly" it may be that the U.S. Military has access to, there are a whole lot more potential insurgents and that evens out out odds?
Yes and no. Yes, the US has more potential insurgents - but no, it's not exactly like that, because you can't occupy yourself in the same sense that we occupy Iraq. US military personnel are not part and parcel of Iraq - they remain 'other'. Put them in a similar situation inside the US, and they're not 'other' anymore - they're 'us'. You'd be assuming that 1 million US servicemen would remain a cohesive useful force when asked to attack their own homes and families - not going to happen. Some would remain - some would go home.
Personally, I'm not sure I agree but I understand what you're saying.
I'm just saying that playing the USA as adversary of the USA changes a lot of assumptions. Even more than the Civil War did.
Sure I understand that there are up to 80 million firearms owners in the U.S. (as an upper bounds) but how many of those represent "gradpa's .22" or a single .38 revolver bought for self defense? How many of those owners would actually engage in insurgency? Would it REALLY be possible for an insurgency to cut supply lines?
Yes, and here's why. The US military runs on civilian access. Civilians bring the bread and gasoline and do the dry cleaning and even provide the weapons and ammunition. A typical military base, apart from perhaps a few like NORAD or Area 51 (hehehe) or whatever are not typically self-sustaining beyond a week or so. No food, no gasoline, no services - they're not fortresses, they can't survive. They don't have the manpower to impress and force civilians to provide those services - forget their own supply lines, they'd have to reach out and protect nationwide supply lines.
In a foreign invasion, if the invading army can't get supplies from the locals, they build their own supply lines and bring in stuff from home. When at home...where they gonna get their stuff?
And the weapon mis-match? Doesn't matter. The US is not going to nuke the US, or employ bombs or high energy devices against our own infrastructure. It's like this - would you go after a burglar in your home with a flame-thrower? No, you would use a plain old fashioned shotgun. Same theory here.
And there would be no set-piece battles, it would all be asymmetric warfare, and some of the opponents of the military would be military veterans and military deserters, equally matched. Don't forget the Nat Guard armories located in civilian hands.
Well, anyway, like I said, just something to think about as we (as a nation) rubber stamp the Military having the AA-12 with HE/Fragmentation shells while the citizens are limited to (at best) 6 rounds of slug in a semi-auto.
They won't be knocking down bridges or blowing up infrastructure, so most of their best weapons are neutralized before they can be used.
Imagine you as an invading army, and your neighbor's house as the land you're invading. You don't really care too much if you severely damage their house, nor if you kill all the people inside, and your food and supplies come from YOUR house.
Now imagine you are invading your own house, fighting your own family. Blow up your fridge, you got no cold beer. Blow up your spouse, you got no...well, you get the idea. It's very different when you're stomping around in your own house.