AoE IV Tech Tree
Civilizations
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Landmarks
Military
Support
Economic
I
Dark Age
Barbican of the Sun
Imperial Academy
Barracks
Spearman
Town Center
Imperial Official
Scout
Villager
Lumber Camp
Forestry
Mill
Survival Techniques
Wheelbarrow
Mining Camp
Dock
Granary
Survival Techniques
Wheelbarrow
Outpost
II
Feudal Age
Astronomical Clocktower
Imperial Palace
Hardened Spearman
Archery Range
Archer
Zhuge Nu
Stable
Horseman
Blacksmith
Bloomery
Fitted Leatherwork
Iron Undermesh
Siege Engineering
Steeled Arrow
Textiles
Double Broadax
Horticulture
Professional Scouts
Specialized Pick
Market
Trader
Explosive Junk
Fishing Boat
Junk
Trade Ship
Transport Ship
Extended Lines
Naval Arrowslits
Horticulture
Professional Scouts
Fortify Outpost
Handcannon Slits
III
Castle Age
Great Wall Gatehouse
Spirit Way
Veteran Spearman
Palace Guard
Veteran Archer
Veteran Zhuge Nu
Crossbowman
Veteran Horseman
Fire Lancer
Lancer
Siege Workshop
Counterweight Trebuchet
Nest of Bees
Springald
Greased Axles
Keep
Boiling Oil
Extra Materials
Springald Emplacement
Decarbonization
Insulated Helm
Wedge Rivets
Balanced Projectiles
Military Academy
Monastery
Monk
Herbal Medicine
Lumber Preservation
Fertilization
Shaft Mining
War Junk
Drift Nets
Armored Hull
Extra Hammocks
Incendiaries
Springald Crews
Fertilization
IV
Imperial Age
Enclave of the Emperor
Elite Spearman
Elite Palace Guard
Battle Hardened
Elite Archer
Elite Zhuge Nu
Elite Crossbowman
Grenadier
Handcannoneer
Pyrotechnics
Elite Horseman
Elite Fire Lancer
Elite Lancer
Spyglass
Bombard
Additional Barrels
Geometry
Lightweight Beams
Reload Drills
Roller Shutter Triggers
Cannon Emplacement
Damascus Steel
Master Smiths
Angled Surfaces
Platecutter Point
University
Ancient Techniques
Biology
Chemistry
Court Architects
Elite Army Tactics
Incendiary Arrows
Serpentine Powder
Siege Works
Silk Bowstrings
Piety
Tithe Barns
Crosscut Saw
Precision Cross-Breeding
Cupellation
Baochuan
Explosives
Heated Shot
Shipwrights
Swivel Cannon
Thunderclap Bombs
Precision Cross-Breeding