United States/Tree

Town Center
Units Upgrades
 * Settler
 * Minuteman
 * Colonial Age -> Fortress Age -> Industrial Age -> Imperial Age

Manor House
No units or upgrades are available.

Market
Upgrades
 * Hunting Dogs -> Steel Traps
 * Gang Saw -> Log Flume -> Circular Saw
 * Placer Mines -> Amalgamation
 * Blunderbuss
 * Great Coat

Mill
Upgrades
 * Seed Drill -> Artificial Fertilizer

Livestock Pen
Upgrades
 * Selective Breeding

Dock
Units Upgrades
 * Fishing Boat
 * Caravel
 * Galleon
 * Frigate
 * Monitor
 * Gill Nets -> Long Lines
 * Armor Plating
 * Carronade -> Percussion Lock
 * Ship's Howitzers
 * Imperial Man-of-War and Monitor

Outpost
Upgrades
 * Frontier Outpost -> Fortified Outpost

Wall
Upgrades
 * Bastion

Church
Units Upgrades Mission Fervor Town Watch Gas Lighting Mercantilism Standing Army Mass Cavalry]] Grand Encampment]]
 * Monk
 * Spy
 * [[Church#Improvements|Bastion
 * [[Church#United States|American Patriots

Barracks
Units Upgrades
 * Pikeman
 * Musketeer
 * Skirmisher
 * Veteran, Guard, and Imperial infantry

Stable
Units Upgrades
 * Hussar
 * Dragoon
 * Veteran, Guard, and Imperial Cavalry

Artillery Foundry
Units Upgrades
 * Falconet
 * Culverin
 * Mortar
 * Horse Artillery
 * Petard
 * Upgraded Artillery

Arsenal
Upgrades Infantry Breastplate Socket Bayonet]] Ranged Cavalry Caracole]] Gunner's Quadrant Heated Shot]]
 * [[Arsenal#Infantry|Counter Infantry Rifling
 * [[Arsenal#Cavalry|Cavalry Cuirass
 * [[Arsenal#Artillery|Incendiary Grenades

Plantation
Upgrades
 * Bookkeeping -> Homesteading -> Refineries

Saloon
Units Upgrades
 * Various Mercenaries
 * Wild West

Capitol
Upgrades
 * Blockade
 * Spies
 * Knighthood -> Peerage
 * Immigrants
 * Large Scale Agriculture
 * Deforestation
 * Excessive Taxation
 * Legendary Native Warriors