UU suggestions for New Rome:
Chariots. Cavalry/Vehicles for Ares to command. Bonus against early gunpowder (muskets, flintlocks, weak pistols, etcetera...) and archers. They should have multiple versions of them:
1st version (early game): Moved by horses. Cavalry. Look pretty much like vanilla chariots, except that the soldiers look more post-apoc. Vulnerable to good guns. (not muskets and flintlocks)
2nd version (mid-game): Moved by steam power. Vehicles that don't need to refuel. Not vulnerable to guns. Van Buren (BIS' cancelled Fallout 3) had a group of humans with chariots moved by steam power. They look like this:
http://images2.wikia.nocookie.net/fallout/images/thumb/a/a1/Legion.jpg/800px-Legion.jpg
3rd version (late mid-game): Perfected second version. Maybe mounted heavy weapons on a wagon, or a lot of shooters in a chariot? Not as good as normal vehicles, but superior to late cavalry and doesn't run out of fuel.
Legion: Powerful, disciplined melee formation. Uses roman tactics and formations to defeat other melee units and crossbownmen, so they get good bonuses against both. Can't do much against guns, though, so they get a penalty against them. No penalty or advantage against cavalry and no chance against vehicles.
1st version (early game): A bunch of guys with spears, big knifes and junk shields and maybe some armor. Disciplined, if compared to other melee troops. Perfect for a rush along some gunpowder and crossbows for cover.
2nd version (late mid-game): A rag-tag mix of spears, shorts swords, strong shields and armor.
3rd version (mid-game): Good swords, some spears, best shield and armor of all melee units. Pretty brutal with proper cover by ranged units. They totally kill other melee units.
What do you guys think?