The material below is open game content.
There are four different unit types used in the OMCS to reflect differing capabilities and special skills upon the battlefield. The proper use of such units can ensure victory for a general, even in the face of overwhelming opposition.
Infantry units from the core of most forces and comprise of any unit that does not meet the requirements of archers, cavalry or skirmishers. Such units receive no special bonuses or penalties within the OMCS.
Any unit armed with a ranged weapon with a range increment of at least 50 ft. is designated as an archer unit. Archer units are able to keep their distance from the main line of battle and rain missle weapons down upon their enemies from a distance.
Any unit riding any kind of mount into battle is designated as cavalry. Cavalry units are fast moving forces in the battlefield, able to attack enemy units almost at will. Any Ride checks are made by the unit as a whole.
Any unit wearing no or light armour may be designated as a skirmish unit, taking to the field in a small dispersed formation that allows them to operate with great flexibility. A skirmisher unit only suffers normal damage from any ranged or magical attack and gains a +2 competence bonus to all Initiative checks. However, no skirmisher unit may have more than 20 members at any one time. Cavalry units with light horses or warhorses wearing no barding may also be designated as a skirmisher units and gain these bonuses and penalties. Such unit are known as skirmishing cavalry.