Do you mean Legion VI, now called Civitates Bellantes?
Have played an earlier incarnation of the rules and they worked fine. Not particularly complex; the biggest things are that there are quite a few modifiers, so you need the QRS, and that there are different types of movement – march movement, manoeuvre movement and charges – and that these occur during different phases of the turn.
IIRC, it's fairly standard IGO UGO, but if units are not in command they have to take a control test and there's a chance that they will not do what you want them to do.
It's a unit-based rather than an element-based game, and each unit has various characteristics which define it: experience, type, etc. It has a points system you can use if you like.
Generals use their limited command point allocation to perform different actions during the turn (inspire troops, rally, faster movement and such things).
Damage is measured in DPs (death, disorder and desertion points), which units accumulate in combat and in moving through difficult terrain. DPs can be reduced by resting, and generals can help with this too.
Combat results involve DPs, forced actions (rout, follow up etc) and stand losses. Units can rally.
Have to give these another crack myself, actually.
Hope that helps, anyway.
