This was the largely Argentinian army of San Martin during the invasion of Spanish held Chile. The game played really well with Black Powder. A cavalry battle on the left flank flowed back and forwards whilst the infantry fought over a village. The buildings are Grand Manner - real substantial 28mm buildings these.
I built up these armies for a series of display games a few years ago and they featured in Wargames Illustrated. You can see more of the figures and find out more about the campaign at my website.