Modern age mod (all ages are available anyway). All 24 tribes are playable. All tribes can create more units in Modern age: 8 infantry units, 8 mechanized units, 3 artillery. New Buildings: small bunkers and Armor Plant.
United States Police officers and Police station.
They still look like the freaking Gestapo! lol
Make the officer uniforms blue.
I was lazy, I used what I've found ready done ;)