Gamers may be surprised to find that Legio Wargames' Comitatus provides no army lists, although it does provide an example of the Roman army at Chalons 451A.D.
However, it looks to me that if you know the basics about your chosen army, or have access to army lists for other game systems, it should not be difficult to come up with an army for Comitatus.
There are five troop types, each with several sub-types:
Light infantry – skirmishers, archers, crossbowmen, javelinmen, armed rabble
Heavy infantry – shock infantry, Roman infantry, shieldwall infantry, spearmen, spear & bow
Light cavalry – light javelin cavalry, light horse archers, mounted infantry
Heavy cavalry – heavy horse archers, heavy javelin cavalry, lance & bow cavalry, shock cavalry, knights, cataphracts
Special troops – artillery, elephants, wagons
Heavy infantry can be fielded as full-strength or half-strength.
A unit may be classed as "armored" if it is more armored than the usual case for its troop type. Cavalry with armored riders but unarmored mounts can be "partial armor."
Training and experience is ranked from A to C. Morale is ranked from -1 to +2.
A unit generally consists of two to four elements. Units are then combined into commands, each with a commander. If there are allies, they may be in one or more contingents, grouped into commands and with an over-all commander. The entire force is led by a supreme commander, the General.
Note that each leader comes with his own bodyguard unit of 1-4 elements, the comitatus.
