Tiocfaid ár lá, it's not Fedposting if you're Irish enough.
So, in brief, as a citizen you have just as much right to enforce the law as whoever the faggot in uniform is. You may not have the means or the popularity, but they could be nonces for all you know.
Follow a set of rules, and behave as if you're occupied by foreigners. Then, dig holes and do things in the holes.
If you are alone with nobody you can trust in an active warzone, it is most likely that you are going to die. It doesn't matter how well armed you are, or how secure your bunker is; you will perish while you sleep. Everybody who endured the Yugo wars will tell you this. It is over for most farmercels.
I don't know, posting a selfie of your current location would suddenly become a free one-time SWAT raid or air strike. The hard part is convincing the crackhead outside your house to wear a printer paper mask of your face.
Tactical gunts are of extreme importance for they follow the golden ratio. Even .50 caliber rounds bounce right off. There's no getting through them. Remember, the bigger the gunt the bigger your defense.
Some beginning tips:
Compartmentalize! What you want is a very large and complex problem. You are more likely to solve it by separating it to smaller steps. What do you need? Okay what do you need to get what you need? How can you get what you need to get what you need.
A good way is to go from the bottom of the Hierarchy of (s)Needs.
So water for example: Do we have a source of raw water like a stream or rain barrel? Do we have a filter system to remove particulates? Do we have a stable source of heat to bring it to a boil? Do we have a reverse osmosis system to remove chemicals from it?
Go up the pyramid and establish your plans for each of these things. If you fail a previous tier you cannot ascend.
If that was the only goal then you would just need to run into a forest and not look back.
You will be dead of dehydration in 3 days, 2 days if it is hot and dry.
Well not dying/don't get shot is the obvious and yeah, don't get fucking shot.
But if shit has TRULY gone down and it's every man for themselves something to keep in mind is range/reach is king, if you can kill a motherfucker before he can get near you that's the safest way to take someone out. So if you end up for whatever reason having to fight someone at close range believe it or not modern recreation gladiuses are practically the perfect self defense weapon. They're quick to draw and longer than a knife so chances are you'll have more reach than the other guy.
Of course all this goes out the window if you or the other guy has a gun but honestly rifles are just up and better than handguns in any real combat situation so in a life or death type deal you should already have one ready to go and if the asshole in question even seemed slightly dangerous he should've been dead long before you were ever in need of drawing a sidearm in the first place.
So as far as a sidearm goes I'd rather have something I could pull quick and stab a mofo with then a revolver since if things have gotten to that point for whatever reason, which they NEVER should if you can help it, I can draw a blade and stab someone a whole lot quicker than either I or he can draw a sidearm, aim and shoot.
I know it sounds like a fucking Roman soldier meme but a modern gladius is actually a very good sidearm.
Oh, that's just about driving as far into Germany, hence away from the German soldiers, as possible.
As for tanks, I have scattered knowledge of North Africa - I'm not sure about the USA, but the UK has two types of Royal Engineer.
The Sappers, the usual Royal Engineers, who work in similar fields to the US Army Corps of Engineers - and then another set, the Royal Electrical and Mechanical Engineers, who are attached at a battalion level. They were extremely impactful at El Alamein, their first major use.
At the time, mechanics were much more difficult to train since vehicles were relatively new, so having trained soldiers who were able to conduct field repairs was handy - the Germans had better tanks, but they had no way of restoring them to action during the battle. Over the course of the North Africa campaign, the Germans were bled dry while the British and "Commonwealth" forces were able to "Wolverine-heal" from the damage at a much faster rate.
Commonwealth, as in, white Australians, New Zealanders, Rhodesians and South Africans. Contrary to popular belief, most of these guys were white. Even among the Indians, the few "Indian soldiers" who saw battle were Anglo-Indians, i.e white dudes born in India. You were more likely to fight Irishmen, as in, those born in the 26 counties which were an independent, neutral country, than fight anyone who wasn't white if you fought against the British at that time.
3 inch blade, thumb along the back of it. "Punch" and force it, you're not trying to peel a potato. It's not an anime, it's a lot more wrasslin' and a lot less dancing.
All of those 2000 arrests were Irish. The British Army went to Ireland to "keep the peace" - following attacks against Irish by British loyalists. (you may hear this interpreted in the Sectarian way - Catholic = Irish Nationalist, Protestant = British Loyalist. Religion is a proxy for race in Europe. The same is true of Yugoslavia - Catholic = Croatian/Italian, Orthodox = Serbian/Russian, Islam = Bosnian/Turkish)
This was the "Order 66" situation, the British Army rounded up thousands of its own citizens over the course of two days and "interned them" without trial or probable cause.
They even parked a prison ship in the capital, Belfast, called the HMS Maidstone to accommodate the thousands of political prisoners.
Back to what's really important - the REME structure was really interesting - instead of the Civil Engineer style of the Royal Engineers, the mix of professional specialised Engineers was used by the Provisional IRA, with their "officers" being called "Quartermaster" - an Active Combat Unit didn't have any association with anyone else, except for a Quartermaster who worked as an intermediary between the leadership and the Active Combat Unit. Contrary to popular belief, having University-educated professionals working in the mixed-combat role was really hard to deal with for the British authorities.
Quartermasters were the entire reason that the H-Blocks were built in the first place - they had to build a special prison (with air defences) because the Quartermaster system meant that if you arrested an IRA officer, they would immediately start advising any other Irish prisoners about how to make explosives. There is a point in the system where, with enough knowledge and experience, you genuinely become a problem to deal with.
This is also likely why there's so much regulation about these things in the EU - it's due to the experience with the IRA. To Americans - they will try the same shit against you at the first opportunity, the end goal is to learn to make what you need from sea water, air and different types of rock. They might loosen up the restrictions on automatics, provided they can burst into your house to see where they are at any point - and they will restrict chemical purchases to remove sulphuric and nitric acids, and nitrate salts, from the shelves under the guise of "environmental regulations" - yes, this includes curing salt and garden fertiliser, it's all diluted to hell in the EU.
There is definitely a "Gold Standard" for how to fight unconventionally, and it's the Provisional IRA. However, you must overcome the "Fedposting" meme - speak openly and associate freely. Don't do anything stupid, loose lips sink ships, and don't fall for the trick of "Well, all criminals are the same, so cutting a few inches off the barrel of a shotgun is the same as strangling children to death" - this bit is an important "psychological step", since the IRA genuinely believed they were acting well within their rights as Irish soldiers and their behaviour showed it. So, a group of men who were holding you at gunpoint could be the Army, they could be carjackers, police or even a Loyalist paramilitary like the UDA - you shouldn't go guessing whether or not you'll be alright.
Guerilla warfare only works against armies that give a shit about civvie lives (ie, modern western ones). If that's not the case you are turbo fucked once the enemy starts decimating every town that helps you.
War tactics and strategy are such a complicated subject that a KF thread is too limited to encompass. Mad Dog Mattis has an entire personal library dedicated to those subjects.
But here's what I can say about them, for what it's worth:
You need the the ability and the will to wage war and win; "guerilla warfare" isn't a magic cheat code that makes you immune to drone strikes and ZOG death squads.
Strength in numbers. You are not Rambo. You cannot possibly or even reasonably do it all. Specialization exists so that people can make up for each other's shortcomings.
Amateurs study tactics, professionals study logistics. You need a reliable stream of supplies. It does you no good if you have nothing to shoot and the men are starving.
Don't overestimate your own abilities just because you can shoot paper at a range. The gangbanger and the Taliban guy who can't even read have an advantage over you, because they've actually killed people and been in not-fucking-around fights where life or death are the stakes.