Chivalry
Prerequisite Techs: Civil Service, Horseback Riding, Currency
Leads to Techs: Banking
Unlocks: Knight, Camel Archer, Naresuan's Elephant, Mandekalu Cavalry, Mughal Fort, Castle, Himeji Castle, Defensive Pact Treaties
Civil Service
Prerequisite Techs: Philosophy, Trapping
Leads to Techs: Chivalry
Unlocks: Pikeman, Landsknecht, Chichen Itza, +1 Food for Farms along fresh water
Compass
Prerequisite Techs: Optics
Leads to Techs: Astronomy
Unlocks: Harbor
Currency
Prerequisite Techs: Mathematics
Leads to Techs: Chivalry
Unlocks: Market, Mint, Bazaar, Machu Picchu
Education
Prerequisite Techs: Theology
Leads to Techs: Astronomy, Acoustics, Banking
Unlocks: Wat, University, Oxford University, Notre Dame, The Porcelain Tower
Engineering
Prerequisite Techs: Mathematics, Construction
Leads to Techs: Machinery, Physics
Unlocks: Lumbermill, Fort
Machinery
Prerequisite Techs: Engineering
Leads to Techs: Printing Press
Unlocks: Crossbowman, Chu-Ko-Nu, Longbowman, faster Road movement
Metal Casting
Prerequisite Techs: Iron Working
Leads to Techs: Physics, Steel
Unlocks: Longhouse, Forge, Workshop
Physics
Prerequisite Techs: Engineering, Metal Casting
Leads to Techs: Printing Press, Gunpowder
Unlocks: Trebuchet
Steel
Prerequisite Techs: Metal Casting
Leads to Techs: Gunpowder
Unlocks: Longswordsman, Samura
Theology
Prerequisite Techs: Calendar, Philosophy
Leads to Techs: Education
Unlocks: Monastery, Garden, Angkor Wat, The Hagia Sophia
