Ethiopians/Tree

The Ethiopians have access to the following buildings, units and technologies:

Archery Range
Units Technologies
 * Archer -> Crossbowman -> Arbalest
 * Skirmisher -> Elite Skirmisher
 * Cavalry Archer -> Heavy Cavalry Archer
 * Thumb Ring

Barracks
Units Technologies
 * Militia -> Man-at-Arms -> Long Swordsman -> Two-Handed Swordsman
 * Spearman -> Pikeman -> Halberdier
 * Tracking
 * Squires
 * Arson

Stable
Units Technologies
 * Scout Cavalry -> Light Cavalry -> Hussar
 * Knight -> Cavalier
 * Camel -> Heavy Camel
 * Husbandry

Dock
Units Technologies
 * Fishing Ship
 * Transport Ship
 * Trade Cog
 * Fire Galley -> Fire Ship
 * Demolition Raft -> Demolition Ship
 * Galley -> War Galley -> Galleon
 * Cannon Galleon
 * Gillnets
 * Careening -> Dry Dock
 * Shipwright

Watch Tower
Can be upgraded to:
 * Guard Tower -> Keep

Stone Wall
Can be upgraded to:
 * Fortified Wall

Monastery
Units Technologies
 * Monk
 * Atonement
 * Herbal Medicine
 * Heresy
 * Sanctity
 * Fervor
 * Faith
 * Illumination
 * Theocracy

Castle
Units Technologies
 * Shotel Warrior -> Elite Shotel Warrior
 * Petard
 * Trebuchet
 * Royal Heirs
 * Torsion Engines
 * Sappers
 * Conscription
 * Spies/Treason

Town Center
Units Technologies
 * Villager
 * Town Watch -> Town Patrol
 * Feudal Age -> Castle Age -> Imperial Age
 * Loom
 * Wheelbarrow -> Hand Cart

Siege Workshop
Units
 * Mangonel -> Onager -> Siege Onager
 * Battering Ram -> Capped Ram -> Siege Ram
 * Scorpion -> Heavy Scorpion
 * Bombard Cannon

Blacksmith
Technologies
 * Padded Archer Armor -> Leather Archer Armor -> Ring Archer Armor
 * Fletching -> Bodkin Arrow -> Bracer
 * Forging -> Iron Casting -> Blast Furnace
 * Scale Barding Armor -> Chain Barding Armor
 * Scale Mail Armor -> Chain Mail Armor -> Plate Mail Armor

University
Technologies
 * Masonry -> Architecture
 * Fortified Wall
 * Ballistics
 * Guard Tower -> Keep
 * Heated Shot
 * Murder Holes
 * Arrowslits
 * Chemistry
 * Siege Engineers

Mining Camp== Technologies
 * Stone Mining -> Stone Shaft Mining
 * Gold Mining -> Gold Shaft Mining

Lumber Camp
Technologies
 * Double-Bit Axe -> Bow Saw -> Two-Man Saw

Market
Units Technologies
 * Trade Cart
 * Cartography -> Caravan
 * Coinage -> Banking
 * Guilds

Mill
Technologies
 * Horse Collar -> Heavy Plow