How does ground combat work, exactly?

[Zereth]

Well, in the stock, it looks like... a Small Emiessive Armor is "Prevents damage 3 or less", one unit of Militar does 10 damage, and Ground Combat Modifier Damage Percent is 30, so Small Emissive Armors would make troops invincibile to militia, if they worked. Guess they don't.

And don't troops fight at range 1, where the base to-hit chance is 100%? I'm trying to figure out how to capture a homeworld in Devnull, and I have (theoretical) access to Bio-Engineered Fanatics, which make 1kt troops, so I was tyring to figure out if droping several throusand of them, or making acutal troops with them as pilots worked better.