Uh. Yes. It works stupidly well. See: Vietnam. All of South America. Most of the American war for independence. Etc.
Discussion
The World's strongest superpower in human existence couldn't defeat people with AK-47s that hid in caves.
20yrs, Trillions of dollars, and a lockdown on American Rights later.
US Military just left a bunch of equipment for them when pulling out.
I'm talking about Afghanistan
What do you know about all South America to make sure there is a monolithic story that binds all of the countries composing it? Pray, do tell, oh great beaver.