A couple of excerpts from the Pergelator Guide to South America:
Peru, a poor mountainous country famous for being the home of Peruvian Marching Powder. The US Embassy is the biggest building in the capital, funded almost entirely by the DEA.
Argentina and Chile are back to back across the Andes mountains. They are the southernmost countries, have temperate climates as opposed to tropical, and might almost be considered first world countries. They both also have a history of mass murder carried out by right wing death squads. That seems to have gone away, but it’s still a feature on most of the rest of the continent.
Bolivia, which is also famous for Peruvian Marching Powder, probably because both here and Peru are mostly high elevation mountains, and coca leaves are what people use in order to function at 15,000 feet without oxygen.
Of course, some of said leaves end up back on this side of the equator, keeping a whole bunch of militarized forces at the semi-ready.