>>42866
Battery -> Group -> Regiment. At present only groups are in use, attached to brigades and wielding 105 mm guns. Armored brigades, however, have 155 mm field artillery. There are several other 155 mm groups as part of "divisional artillery" commands directly under divisions.

I've looked up the AFV units of other South American countries. Chile has Armored Groups, formerly Armored Cavalry Regiments, with the Leopard 2 (Leopard 1 in the low-priority south); Armored Infantry Battalions with the Marder (M-113 in the south); and Mechanized Infantry Battalions (so far only one, but in the future motorized infantry will be mechanized) with the wheeled MOWAG Piranha. It's similar to the Brazilian nomenclature, but Chile has no wheeled armored cars, instead giving the recon role to exploration platoons with Marders, pick-ups and motorbikes.

Argentina has tank cavalry with the TAM or SK-105 tank destroyer, exploration cavalry with the AML-90 (like Brazilian mechanized cavalry but 100% armored car, no APCs) and mechanized infantry with the tracked M-113.

Colombia has mechanized infantry with either the tracked M-113 or the wheeled LAV III, mechanized cavalry with wheeled armored cars and APCs: the Cascavel, Urutu and M-1117 and a medium armored group that due to the absence of tanks has to use the Cascavel.

Peru has tank battalions with the T-55, armored infantry battalions with the M-113, armored cavalry regiments with the AMX-13 light tank and some wheeled AFVs within cavalry in general.

Venezuela has its best tank units with the T-72 and mechanized infantry with the tracked BMP-3, other units have BTRs and older French vehicles. They also have motorized cavalry, not entirely clear what it uses but it's together with the BTR and French-equipped units.

So cavalry either means tanks or partial/full recon role, mechanized can either mean wheeled or tracked and armored mostly means tracked and always means tanks, poor man's tanks (armored cars, tank destroyers or light tanks filling the niche) or units following tanks (e.g. armored communications, armored engineers). Armored infantry/armored fusiliers follow up tanks (hence their vehicles better be tracked) while mechanized infantry is its own thing.