>>42953
>Wheeled armored cavalry operating on its own? So my attempt to find a pattern has already failed.

I guess it is hopeless task. Surely there are some patterns in unit composition, but there also large amount of randomness, like using traditional historical names for units, money issues and other things. Especially in relatively poor South American countries that often don't even have reason to have proper tank units.

>>42996
>Especially the Cold War era could be potentially interesting, after that, one probably can buy arms from whoever dealer.

Not really. Arms market still is very restricted, depending on region and politics. South America has less restrictions than Middle East, but it is still hard for non-western weapons to get in. Except for Venezuela, of course.