You are forgetting one thing. In those foreign examples, the countryside isn’t armed to the teeth. They are mostly very simple farmers. In middle America, vets are everywhere, guns are common.
In US cities, both are very rare.
There will be no government militias coming out of the cities. No other nation on earth has the US tradition of hunting and marksmanship with rifles far better than most nations scarce sniper rifles.
American city people will not be able to dominate our rural people.
I disagree on that point.
Local Governments will have their police forces "look the other way" as criminal gangs go after their political opponents. They will make other concessions as well. That is where your Government-sponsored militias will originate. The Mayor and City Councilmen may find them surprisingly useful.
There have already been historical incidents of this kind of thing in Chicago, New York, and Los Angles. In modern day versions, the Government will supply weapons, ammunition and targets. Check out Caracas, Venezuela for examples of how this goes down. Watch for it to show up in Minneapolis, and Philadelphia.
American city people will not be able to dominate our rural people.
I would hope that is the case.
When the troubles come to your area, you are going to need active supply lines and supporters from out-of-area in order to prevail. Best to keep up contacts with friends from far away as well as nearby.