A few points I'd like to make, if you will...
As to "How could UN troops arrive here in the US?" and similar questions on logistics
and supply of foreign troop elements, consider the following. How many members of the American military have refused the "lawfully constituted order" to don the blue beret and rip the flag patch off their shoulder? What percent are they? My point being that most people will follow the group, whether it's the U.S. Army in Bosnia, or the 2nd SS moving through southern France in '44. Of course, "following orders" only works as a defense if your side wins.
Our military units are increasingly trained and deployed as "peacekeepers". Doesn't this make them much more suited to engage in similar operations domestically? Almost ever piece of video of the military you see nowadays is our troops badgering some locals to reveal and turn over their weapons, supplies and leaders. Constitutional law is ignored on domestic troop use in incidents like Waco and Ruby Ridge, and every day in the fiction of the "war on drugs" and to save us from illegal immigration, even though federal and state law enforcement agencies have personnel, equipment and funding for both of these tasks. These facts, and "training exercises" like "Operation Last Dance" should have been a wake-up call to our citizenry, but such does not seem to be the case.
There are already moves to enforce U.N. laws that supersede U.S. law here in America.
You don't hear the population rising in a general uproar. They're too busy watching
"Friends" on TV and going to the mall in their shiny new SUV. Uprisings tend to be small numbers of "fanatics", which most of us realize, we've already been branded as.
Unfortunately, the ballot box is unlikely to provide relief. Even if issues dear to us were brought to a vote, most people won't care, or vote the way the "yellow journalists" tell them to (this is why the country was established as a constitutional republic, not a democracy, despite what the history books are telling schoolchildren). Polls, as much as such can be trusted, seem to indicate the majority of the population doesn't care if we do away with the Bill of Rights, if the kind and benevolent government promises to get rid them of those racist, rap music-buying, Internet bomb-building, drug pushing, child pornographer gun nuts. Who needs a gun, we've got an army! Who needs privacy, if they've got nothing to hide! Who needs free speech, the TV will tell you what to think! Who needs that demon rum, when...oh, wait, tried that one already. (Note to Aussie posters: I hear they're going to start calling your country a "republic" instead of a "Commonwealth". Don't suppose you'll be getting a "Bill of Rights", though...)
In fact, if voting were the only way our government conducted its business, many of us
would be living in the Confederate States of America, the duly appointed representatives
of which voted to succeed from the Union. This was ignored when Lincoln decided to
restore the Union, by any and all means necessary. A War of Northern Aggression, indeed.
If (or perhaps, when) the time comes, it won't be the stand up fight that we could win. Waging an insurrection is a bloody business. This means being very nasty. Bombing, assassination, sniping LOC targets, random ambushes, mining. It's worse if you're fighting the domestic military on your own soil. Both sides will end up inflicting innocent casualties, generally in larger numbers that those of the combatants. In fact, forcing the enemy to commit atrocities works in your favor (rabbit assassin, take note, having the "helicopter/tank/plane" "level your whole neighbourhood" is favorable to the cause, if not your own health). Still, how many Oklahoma City-like events are you willing to be involved in to repel those come to rescind your freedoms? Because that is what it will mean.
This is a dark subject, but the clouds on the horizon are looking pretty dark to me. There's a storm coming...