I'm making a reimagening of the old game colonization. You build colonies and run trade in the Americas/carribean from the years 1500-1800. Its turn-based and singleplayer, similar style to the old civilization games.
Now, about units/armies: Units are trained one by one (each representing some "regiment"). Basic idea for units are as follows (the three numbers are strength when attacking town/defending town / fighting outside):
Infantry: (2/2/2)require least infrastructure. No special bonuses.
Cavalry: (3/2/4) Fast moving. stronger outside. Gets no defensive bonus from stockades/forts when defending towns.
Artillery: (3/3/1) really slow. Very weak outside (but other friendly units in the same tile will defend before the artillery if attacked). Will half defending units fort bonus
Native fighters: gets bonus in rough terrain but is otherwise pretty weak.
How does this seem to you? I might have different quality units in the same group but this is my basic idea.