Total War: THREE KINGDOMS

Should be fairly straightforward. There are 5 unit types, each designated by a different color: shock cavalry (red), melee cavalry (yellow), missile/ranged (blue), melee infantry (purple), and spear and glaive infantry (green). All characters should have access to the militia versions of all types, and a general gets 6 retinue slots, so you can do theoretically do this with one character if you needed to. Most commandery garrisons above level 4 include a mixture of all 5 types as well.