Iroquois/Tree

Town Center
Units Upgrades
 * Villager
 * Colonial Age
 * Fortress Age
 * Industrial Age
 * Imperial Age
 * Spies
 * Blockade
 * Legendary Native Warriors
 * Iroquois Scouting Party
 * Iroquois Raiding Party
 * Iroquois War Party

Fire Pit
Upgrades
 * Secret Society

Longhouse
Upgrades
 * Woodland Dwellers

Market
Upgrades
 * Hunting Dogs
 * Lumber Ceremony
 * Placer Mines
 * Spirit Medicine
 * Forest People Ceremony
 * Forest Spirit Ceremony
 * Deforestation
 * New Year Festival

Farm
Upgrades
 * Great Feast
 * Harvest Ceremony
 * Green Corn Ceremony
 * Large Scale Gathering
 * Selective Breeding
 * Strawberry Festival

Dock
Units Upgrades
 * Fishing Boat
 * Canoe
 * War Canoe
 * Gill Nets
 * Long Lines
 * Rawhide Covers

Trading Post
The units and upgrades available for the Trading Post depends on what site it is built on

Wall
Upgrades
 * Bastion

War Hut
Units Upgrades
 * Aenna
 * Tomahawk
 * Forest Prowler
 * Elite, Champion, and Legendary
 * Strong War Hut
 * Mighty War Hut
 * Lacrosse

Corral
Units Upgrades
 * Kanya Horseman
 * Musket Rider
 * Elite, Champion, and Legendary
 * Horse Secrets

Siege Workshop
Units Upgrades
 * Ram
 * Mantlet
 * Light Cannon
 * Champion and Legendary
 * Siege Drill

Plantation
Upgrades
 * Earth Ceremony
 * Earth Gift Ceremony
 * Excessive Tribute
 * Maple Festival