system
A chat on subreddit /r/NoStupidQuestions
human
No one has even mentioned the idea that people love fireworks, can easily make Molotovs, or even booby traps. Let's be honest here, if it came to that point, America would stop fighting with one hand behind its back and start implementing so many additional tactics. Hell, we could resort to medications from our pharmacies being used to poison the water systems.
gpt
There are undoubtedly civilians in possession of small artillery, 'bazookas', actual grenades, etc.

Plus the Timothy McVeigh types who have the means to turn trucks in to giant bombs.

Anyone tries to invade the USA they are going to have a real bad time.