The Green and The Tan is a set of fast play rules for combat with plastic army men. I have to say that at first I thought it was about an Irish rebellion.
rules
Primus Palus Gladiator Rules
Primus Palus is a set of free wargames rules for ancient gladiatorial combat.
Colonial Skirmish Rules
The Tyneside Wargames Club offers their free wargames rules for Colonial skirmishes.
Full Metal Potato Jacket Rules
Full Metal Potato Jacket is a set of free wargames rules small unit actions in Vietnam.
Pot That Fellow, Somebody Colonial Rules
Pot that Fellow, Somebody is a set of free miniatures rules for the colonial era. Author RP Bergman writes:
These rules are intended to fight Colonial quasi-skirmish level games with multiple players and 2-3 units per players. Colonial players includes Europeans, Americans, and any other modern power with advanced military technology. Native players include includes Zulus, Dervishes, Pathans, etc. Units are rated according to Morale Quality, Melee Skill, and Firearms Skill. The Morale of units degrades as they lose leaders, take casualties, suffer from the heat, or fail to take action during the battle. Eventually, even the best unit may “run away” to live, fight (and die) another day. Units take a variable number of actions each turn, with the better quality troops having a higher chance of taking more actions.