Okay, this is a question about the possible defense of the United States against a foreign invasion, military coup, or any other possible situation.
Remember this is just for talk. Do you think that police and civilians can bolster the defense of the USA? Now most police forces have armaments to the level of a recon unit. Vehicles (Patrol Cars & Trucks), armored shock troops (SWAT, HRT, & SRT), Aerial Recon & Transport (Helicopter Unit), Marine Patrol (For those departments charged with waterways), and just your standard officer.
Now I know that most special units within the police departments can survive action with military units due to their training and issued equipment. Now, what they can mostly do is just regular infantry style warfare. But they can survive. Now that standard police officer, most have a level IIIA vest and a pistol. A shotgun, sub machinegun, or a carbine/rifle in the vehicle. And if they keep riot gear in the vehicle, they might have a Kevlar vest plus a gas mask. Also possible smoke or CS gas grenades might be within their immediately reach. As for their transport, the ever classic squad car or the SUV would be the most common.
Now in terms of weapon calibers, they use the common pistol calibers. 9mm, .40S&W, .45ACP, .38 Special, .357 Magnum, .357 Sig, and if they’re a special tactics unit; the new 5.7X28mm cartridge. For Rifles either the 5.56X45mm, 7.62X51mm, .30-06, .270 Winchester, or 300 Winchester Magnum. Which the last three calibers mentioned would more than likely be with a bolt action rifle. And for the shotgun, the universal 12 Ga. Now the main problem with any police department if they were to work together with any other group; would be the difference in ammunition calibers and firearm types. I know of departments that use the Glock, S&W Semi-Autos and revolvers, Ruger, Sig-Sauer, Styer, FN, Beretta, and other popular pistol makers. As for rifles, there is the AR-15, Springfield M1A, Sig 550, Remington 700, Winchester M70, Ruger Mini-14, and FN 2000, and the H&K G36. As for the sub machineguns, there is the H&K MP5, FN P90, Beretta CX4 Strom Carbine (Not a sub machine but a pistol caliber carbine), Uzi, Bushmaster Carbon 15 AR Pistol, and the Colt 9mm AR-15 Carbine.
That is a major problem with them, so many different weapons and calibers. They might not be able to get possibly re-supply when needed.
Now for the civilian population, I’m limiting it to two different groups. The “Militia” and the average gun owner. The militia type person is one that has a rifle, combat equipment, and some possible training. Now I don’t want to confuse those with the standard stereotypical image of the White Power Militia member. I’m just referring to someone that is prepared incase of the SHTF (SH!T HITTING THE FAN). They would be equal in terms of equipment with a special tactics officer in a police department. Most people of this group have a rifle as they’re main armament. Whether it be the AK-47, AK-74, CETME/G3 Clone, AR-15, FN FAL, Ruger Mini-14, Ruger Mini-30, Mauser 98, Mosin Nagant, Lee Enfield, M1 Carbine, Beretta CX4 Storm Carbine, SKS Carbine, M1 Garand, Springfield M1A, or another type of Semi-Auto or Bolt Action rifle that was either a military rifle is was built to compete within the market. Like the Kel-Tec Su-16 Carbine. Pistols are pretty much the same as that for the police departments.
The equipment would more than likely be a set of BDUs, Web Gear of some sort, and if some spend the money. A Kevlar Vest and Helmet. And the only mobile assists would be their personal vehicles. Cars, Trucks, and SUVs.
Now the same issue would happen to those that don’t use military equipment. Expect they would use additional calibers for mil-slurp rifles like the 7.62X54R, 7.92X57mm, 7X57mm, 5.45X39mm, and 7.62X39mm. Only those with an AR-15 rifle and Beretta 92FS/M9 pistol could get a re-supply from the military. Same deal with the police departments. And the shotgun issue is that same.
Now for the second group, they would use their hunting firearms. Lever Actions, Bolt Actions, and Semi-Auto rifles. Anything chambered from .17 mach 2 to .45-70 Government. And pistols could be from .22LR to .45 Long Colt or .50AE. Shotguns could be either single or double barreled side-by-sides. Pump Actions, or Semi Autos. And the ammunition could be from .410 Gauge to .12 Gauge. Equipment would be little to nothing, and personal transport is the same as the other civilian group. Cars, Trucks, and SUVs. I would say that this would be about the same as the insurgency. Nothing more than a firearm and a pair of legs.
Now what I’m getting at is what do you think each group can do and how would they use their resources. Subjects like this always interest me and I know that some other people must think about it too.