[Barnacle Bill]

Building on Noble's idea, I will definately include such a mod in the next revision of my personal mod pack. I'm thinking sml/med/lrg = regiment/brigade/division, though, when you're talking about conquering planets with billions of inhabitants. The troop components then become various types of company/battalion "sub-units". The troop cockpit clearly becomes HQ Company. Infantry sub-units would add defense to the unit, tank sub-units offense, got to think about artillery. Maybe all of them add offense & defense but in differing proportions, with only artillery having the range to shoot off planet in tactical space combat (short range, maybe 2 max). Shield & armor technology improvements would translate into better defensive capabilities for all sub-unit types. It may turn out to be a little complex, with multiple prerequisites for each troops technology advance (I believe the game engine already uses that).