Military Academy: Military Tech > Military Academy
Training Guild: Military Tech > Military Academy > Training Guild
Blacksmith: Castle > Blacksmith
Marketplace: Castle > Commerce
Barracks: Military Tech > Military Academy > Barracks
Tower: Castle Protection > Castle Defense > Towers (ma)
Drawbridge: Castle > Castle Protection > Castle Walls > Drawbridge (ma)
ma = military academy tg = training guild bl = blacksmith
Stone Walls: Castle Protection > Palisades > Stone Walls (bl)
Palisades: Castle Protection > Palisades (bl)
Outpost: Recon > Outpost
Market Wares: Castle > Commerce > Marketplace > Market Wares
Market Tribute: Castle > Commerce > Marketplace > Market Wares > Market Tribute I-III
Advanced Trading: Castle > Commerce > Marketplace > Market Wares > Advanced Trading
Expert Trading: Castle > Commerce > Marketplace > Market Wares > Advanced Trading (bl)
Taxes: Castle > Taxes
Commerce: Castle > Commerce
Castle Protection: Castle > Castle Protection
Castle Walls: Castle > Castle Walls
Castle Defense: Castle > Castle Protection > Castle Defense
Recon: Castle > Recon
Spy Network: Castle > Recon > Spy Network
Outpost Range: Recon > Outpost > Outpost Range
Tax Reform: Castle > Military Tech > Commerce Tech > Build a Marketplace > Tax Reform
Construction: Castle > Blacksmith > Construction
Building Materials: Castle > Blacksmith > Building Materials
Snow Travel: Military Tech > Military Academy > Training Guild > Snow Travel
Cursed Travel: Military Tech > Military Academy > Training Guild > Cursed Travel
Rough Travel: Military Tech > Military Academy > Training Guild > Rough Travel
Swamp Travel: Military Tech > Military Academy > Training Guild > Swamp Travel
Grass Travel: Military Tech > Military Academy > Training Guild > Grass Travel
Scouting: Military Tech > Military Academy > Scouting (tg)
Awareness: Military Tech > Military Academy > Scouting > Awareness (tg)
Eagle Eye: Military Tech > Military Academy > Scouting > Awareness > Eagle Eye (tg)
Advanced Training: Military Academy > Advanced Training
Archery: Military Academy > Archery
Advanced Recruitment: Military Academy > Advanced Recruitment
Advanced Armor: Military Academy > Advanced Armor (bl)
Advanced Weapons: Military Academy > Advanced Weapons (bl)
Expert Recruitment: Military Academy > Advanced Recruitment > Expert Recruitment
Expert Armor: Military Academy > Advanced Armor > Expert Armor (bl)
Master Armor: Military Academy > Advanced Armor > Expert Armor > Master Armor (bl)
Expert Weapons: Military Academy > Advanced Weapons > Expert Weapons (bl)
Master Weapons: Military Academy > Advanced Weapons > Expert Weapons > Master Weapons (bl)
Wood Panelling: Castle > Blacksmith > Wood Panelling
Takeover Protection: Castle Protection > Takeover Protection
Expert Training: Barracks > Advanced Training > Expert Training (tg)
Master Training: Barracks > Advanced Training > Expert Training > Master Training (tg)
Advanced Melee: Barracks > Advanced Melee (tg)
Expert Melee: Barracks > Advanced Melee > Expert Melee (tg)
Master Melee: Barracks > Advanced Melee > Expert Melee > Master Melee (tg)
Seige Machines: Castle > Castle Protection > Seige Machines (tg)
Expert Seige: Castle > Castle Protection > Seige Machines > Expert Siege (tg)
Advanced Archery: Military Academy > Archery > Advanced Archery (tg)
Expert Archery: Military Academy > Archery > Advanced Archery > Expert Archery (tg)
Master Archery: Archery > Advanced Archery > Expert Archery > Master Archery (ma) (tg)
Stone Shielding: Castle > Blacksmith > Wood Panelling > Stone Shielding
(ma)
(bl)
(tg)
(barracks)
(tower)
(outpost)
(stone wall)
(palisade)
(drawbridge)
(marketplace)