Romance of the Three Kingdoms: The Legend of Cao Cao/Research

From Koei Tecmo Wiki

Research in Romance of the Three Kingdoms: The Legend of Cao Cao comprises a list of technological advances made to improve different aspects of the player's gaming experience. Warlord levels and silver coins are necessary to learn new research skills or bolster previous ones. These are divided into three categories containing their own skill tree.

Type Description
Battle Research Research skills that strengthen combat tactics and raise weapon mastery.
Govern Research Research skills that improve construction and open up new facility options.
Draft Research Research skills that unlock new recruits and enhance their performance.


Skill List

Skill Research Conditions
Command 1 Required: None Unlocks: Enhance Swordsmanship 1
Mastery Ranks: 2
Rank 1 Increases max assignment capacity by 1.
Lv. 4 1,000 Silver
Rank 2 Increases max assignment capacity by 2.
Lv. 6 3,000 Silver
Command 2 Required: Enhance Siege 1 Unlocks: Enhance Siege 2
Mastery Ranks: 3
Rank 1 Increases max assignment capacity by 3.
Lv. 32 246,000 Silver
Rank 2 Increases max assignment capacity by 4.
Lv. 33 264,000 Silver
Rank 3 Increases max assignment capacity by 5.
Lv. 34 283,000 Silver
The Art of War Required: None Unlocks: None
Mastery Ranks: 5
Rank 1 Increases maximum level of defensive soldiers within a domain by 1.
Lv. 10 10,000 Silver
Rank 2 Increases maximum level of defensive soldiers within a domain by 3.
Lv. 20 59,000 Silver
Rank 3 Increases maximum level of defensive soldiers within a domain by 5.
Lv. 30 150,000 Silver
Rank 4 Increases maximum level of defensive soldiers within a domain by 7.
Lv. 40 291,000 Silver
Rank 5 Increases maximum level of defensive soldiers within a domain by 9.
Lv. 50 486,000 Silver
Early Training Required: None Unlocks: None
Mastery Ranks: 4
Rank 1 Increases the initial level of newly recruited commanders by 1.
Lv. 20 54,000 Silver
Rank 2 Increases the initial level of newly recruited commanders by 2.
Lv. 30 162,000 Silver
Rank 3 Increases the initial level of newly recruited commanders by 3.
Lv. 40 315,000 Silver
Rank 4 Increases the initial level of newly recruited commanders by 4.
Lv. 50 526,000 Silver
Chain of Command Required: None Unlocks: None
Mastery Ranks: 2
Rank 1 Uses tactics more actively during auto battle.
Lv. 24 89,000 Silver
Rank 2 Uses tactics more actively during auto battle.
Lv. 36 266,000 Silver
Enhance Swordsmanship 1 Required: Command 1 Unlocks: Enhance Swordsmanship 1, Enhance Shields 1, Enhance Archery 1
Mastery Ranks: 2
Rank 1 Increases attack by 5 when using a sword.
Lv. 6 4,000 Silver
Rank 2 Increases attack by 10 when using a sword.
Lv. 8 8,000 Silver
Enhance Swordsmanship 2 Required: Enhance Staff Handling Unlocks: Enhance Shields 2
Mastery Ranks: 3
Rank 1 Increases attack by 20 when using a sword.
Lv. 20 83,000 Silver
Rank 2 Increases attack by 30 when using a sword.
Lv. 25 139,000 Silver
Rank 3 Increases attack by 50 when using a sword.
Lv. 30 212,000 Silver
Enhance Archery 1 Required: Enhance Swordsmanship 1 Unlocks: Counter Archery 1
Mastery Ranks: 2
Rank 1 Increases attack by 5 when using a bow or a crossbow.
Lv. 8 8,000 Silver
Rank 2 Increases attack by 10 when using a bow or a crossbow.
Lv. 10 14,000 Silver
Enhance Archery 2 Required: Enhance Artillery Unlocks: Counter Archery 2
Mastery Ranks: 3
Rank 1 Increases attack by 20 when using a bow or a crossbow.
Lv. 20 83,000 Silver
Rank 2 Increases attack by 30 when using a bow or a crossbow.
Lv. 25 139,000 Silver
Rank 3 Increases attack by 50 when using a bow or a crossbow.
Lv. 30 212,000 Silver
Enhance Spearmanship 1 Required: Enhance Swordsmanship 1 Unlocks: Ambush 1
Mastery Ranks: 2
Rank 1 Increases attack by 5 when using a spear.
Lv. 8 8,000 Silver
Rank 2 Increases attack by 10 when using a spear.
Lv. 10 14,000 Silver
Enhance Spearmanship 2 Required: Enhance Tactics Unlocks: Ambush 2
Mastery Ranks: 3
Rank 1 Increases attack by 20 when using a spear.
Lv. 20 83,000 Silver
Rank 2 Increases attack by 30 when using a spear.
Lv. 25 139,000 Silver
Rank 3 Increases attack by 50 when using a spear.
Lv. 30 212,000 Silver
Enhance Staff Handling Required: Enhance Shields 1 Unlocks: Enhance Swordsmanship 2
Mastery Ranks: 2
Rank 1 Increases attack by 20 when using a staff.
Lv. 15 40,000 Silver
Rank 2 Increases attack by 40 when using a staff.
Lv. 20 78,000 Silver
Enhance Tactics Required: Ambush 1 Unlocks: Enhance Spearmanship 2
Mastery Ranks: 2
Rank 1 Increases attack by 20 when using a fan or a jeweled sword.
Lv. 15 40,000 Silver
Rank 2 Increases attack by 40 when using a fan or a jeweled sword.
Lv. 20 78,000 Silver
Enhance Artillery Required: Counter Archery 1 Unlocks: Enhance Archery 2, Enhance Siege 1
Mastery Ranks: 2
Rank 1 Increases attack by 20 when using artillery.
Lv. 15 40,000 Silver
Rank 2 Increases attack by 40 when using artillery.
Lv. 20 78,000 Silver
Enhance Siege 1 Required: Enhance Artillery Unlocks: Command 2
Mastery Ranks: 2
Rank 1 Increases damage to buildings by 15.
Lv. 20 78,000 Silver
Rank 2 Increases damage to buildings by 30.
Lv. 30 200,000 Silver
Enhance Siege 2 Required: Command 2 Unlocks: Dance Routine
Mastery Ranks: 3
Rank 1 Increases damage to buildings by 60.
Lv. 34 300,000 Silver
Rank 2 Increases damage to buildings by 100.
Lv. 42 488,000 Silver
Rank 3 Increases damage to buildings by 150.
Lv. 50 729,000 Silver
Ambush 1 Required: Enhance Spearmanship 1 Unlocks: Enhance Tactics
Mastery Ranks: 1
Rank 1 Increases damage by 25 when a spear-wielding commander attacks from a forest.
Lv. 13 27,000 Silver
Ambush 2 Required: Enhance Spearmanship 2 Unlocks: Counter Riding
Mastery Ranks: 1
Rank 1 Increases damage by 50 when a spear-wielding commander attacks from a forest.
Lv. 35 321,000 Silver
Mount Slayer Required: Counter Riding Unlocks: None
Mastery Ranks: 4
Rank 1 Train spearmen to target the vulnerable parts of warhorses, increasing their physical damage against Spearman commanders by 10%.
Lv. 45 800,000 Silver
Rank 2 Train spearmen to target the vulnerable parts of warhorses, increasing their physical damage against Spearman commanders by 20%.
Lv. 50 1,000,000 Silver
Rank 3 Train spearmen to target the vulnerable parts of warhorses, increasing their physical damage against Spearman commanders by 30%.
Lv. 55 1,200,000 Silver
Rank 4 Train spearmen to target the vulnerable parts of warhorses, increasing their physical damage against Spearman commanders by 40%.
Lv. 60 1,400,000 Silver
Counter Riding Required: Ambush 2 Unlocks: Mount Slayer
Mastery Ranks: 1
Rank 1 Allows a Light Cavalry commander within range to counterattack for 50% damage.
Lv. 40 557,000 Silver
Counter Archery 1 Required: Enhance Archery 1 Unlocks: Enhance Artillery
Mastery Ranks: 1
Rank 1 Activates bow or crossbow counterattacks for 15% damage within a four-directional attack range.
Lv. 13 27,000 Silver
Counter Archery 2 Required: Enhance Archery 2 Unlocks: Exploit Weakness
Mastery Ranks: 1
Rank 1 Activates bow or crossbow counterattacks for 30% damage within a four-directional attack range.
Lv. 35 321,000 Silver
Exploit Weakness Required: Counter Archery 2 Unlocks: Piercing Crossbow
Mastery Ranks: 2
Rank 1 Allows a bow or crossbow-wielding commander to deal 5 additional fixed damage that is unaffected by critical attacks.
Lv. 70 1,500,000 Silver
Rank 2 Allows a bow or crossbow-wielding commander to deal 10 additional fixed damage that is unaffected by critical attacks.
Lv. 90 2,000,000 Silver
Piercing Crossbow Required: Exploit Weakness Unlocks: None
Mastery Ranks: 1
Rank 1 Allows a Crossbow Chariot commander to ignore their target's Critical Attack and Ranged Attack immunity when hitting multiple enemies.
Lv. 95 2,800,000 Silver
Enhance Shields 1 Required: Enhance Swordsmanship 1 Unlocks: Enhance Staff Handling
Mastery Ranks: 2
Rank 1 Increases evasion of all footmen by 5%.
Lv. 10 15,000 Silver
Rank 2 Increases evasion of all footmen by 10%.
Lv. 13 27,000 Silver
Enhance Shields 2 Required: Enhance Swordsmanship 2 Unlocks: Enhance Horsemanship
Mastery Ranks: 1
Rank 1 Increases evasion of all footmen by 15%.
Lv. 35 321,000 Silver
Dance Routine Required: Enhance Siege 2 Unlocks: None
Mastery Ranks: 2
Rank 1 Avoids enemy attacks with dance moves, increasing evasion of all dancers by 5%.
Lv. 65 1,400,000 Silver
Rank 2 Avoids enemy attacks with dance moves, increasing evasion of all dancers by 10%.
Lv. 80 1,900,000 Silver
Ship Construction Required: Enhance Horsemanship Unlocks: Assess Terrain
Mastery Ranks: 5
Rank 1 Builds a ship armored with leather, reducing ranged damage received by Navy commanders in rivers by 10%.
Lv. 80 2,000,000 Silver
Rank 2 Builds a ship armored with leather, reducing ranged damage received by Navy commanders in rivers by 20%.
Lv. 85 2,200,000 Silver
Rank 3 Builds a ship armored with leather, reducing ranged damage received by Navy commanders in rivers by 30%.
Lv. 90 2,400,000 Silver
Rank 4 Builds a ship armored with leather, reducing ranged damage received by Navy commanders in rivers by 40%.
Lv. 95 2,600,000 Silver
Rank 5 Builds a ship armored with leather, reducing ranged damage received by Navy commanders in rivers by 50%.
Lv. 99 2,800,000 Silver
Assess Terrain Required: Ship Construction Unlocks: Shadow Strike
Mastery Ranks: 5
Rank 1 Reduces earth tactics damage for Outlaw commanders by 10%.
Lv. 99 2,000,000 Silver
Rank 2 Reduces earth tactics damage for Outlaw commanders by 20%.
Lv. 99 2,200,000 Silver
Rank 3 Reduces earth tactics damage for Outlaw commanders by 30%.
Lv. 99 2,400,000 Silver
Rank 4 Reduces earth tactics damage for Outlaw commanders by 40%.
Lv. 99 2,600,000 Silver
Rank 5 Reduces earth tactics damage for Outlaw commanders by 50%.
Lv. 99 2,800,000 Silver
Shadow Strike Required: Assess Terrain Unlocks: None
Mastery Ranks: 1
Rank 1 Allows Outlaw commanders to ignore enemy target's First Strike effects when on forest and mountain terrains.
Lv. 99 2,800,000 Silver
Enhance Horsemanship Required: Enhance Shields 2 Unlocks: Ship Construction
Mastery Ranks: 2
Rank 1 Upgrades horseshoes to improve balance, increasing terrain advantages for horse-riding commanders by 3.
Lv. 50 1,000,000 Silver
Rank 2 Upgrades horseshoes to improve balance, increasing terrain advantages for horse-riding commanders by 5.
Lv. 75 1,500,000 Silver
Required: Unlocks:
Mastery Ranks:
Skill Research Conditions
Market Recovery Required: None Unlocks: Commerce 1
Mastery Ranks: 3
Rank 1 Allows the market to sell better quality items.
Lv. 6 3,000 Silver
Rank 2 Allows the market to sell better quality items.
Lv. 8 7,000 Silver
Rank 3 Allows the market to sell better quality items.
Lv. 10 12,000 Silver
Commerce 1 Required: Market Recovery Unlocks: Vitalize 1, Commerce 2
Mastery Ranks: 1
Rank 1 Increases the number of items sold by the Trader by +2.
Lv. 10 14,000 Silver
Commerce 2 Required: Commerce 1 Unlocks: Trade Secrets
Mastery Ranks: 2
Rank 1 Increases the number of items sold by the Trader by +6.
Lv. 12 21,000 Silver
Rank 2 Increases the number of items sold by the Trader by +8.
Lv. 14 30,000 Silver
Trade Secrets Required: Commerce 2 Unlocks: Silk Road
Mastery Ranks: 2
Rank 1 Slightly increases the chance of the Trader selling better items.
Lv. 18 57,000 Silver
Rank 2 Slightly increases the chance of the Trader selling better items.
Lv. 20 73,000 Silver
Silk Road Required: Trade Secrets Unlocks: Enhance Keep
Mastery Ranks: 1
Rank 1 Slightly increases the chance of the Peddler selling better items.
Lv. 25 131,000 Silver
Enhance Defense Required: None Unlocks: None
Mastery Ranks: 5
Rank 1 Increases domain defense level by 1.
Lv. 10 12,000 Silver
Rank 2 Increases domain defense level by 2.
Lv. 12 21,000 Silver
Rank 3 Increases domain defense level by 3.
Lv. 14 30,000 Silver
Rank 4 Increases domain defense level by 4.
Lv. 16 41,000 Silver
Rank 5 Increases domain defense level by 5.
Lv. 18 54,000 Silver
Enhance Keep Required: Silk Road Unlocks: None
Mastery Ranks: 2
Rank 1 Reinforces the outer walls of the Keep, reducing damage taken to 80%.
Lv. 85 1,850,000 Silver
Rank 2 Reinforces the outer walls of the Keep, reducing damage taken to 60%.
Lv. 85 2,350,000 Silver
Enhance Durability Storage Required: Vitalize 1 Unlocks: Vitalize 2
Mastery Ranks: 2
Rank 1 Increases health points of the Stockpile and Treasury by 10%.
Lv. 15 40,000 Silver
Rank 2 Increases health points of the Stockpile and Treasury by 20%.
Lv. 20 78,000 Silver
Enhance Durability Keep Required: Vitalize 2 Unlocks: Enhance Defense Keep
Mastery Ranks: 2
Rank 1 Increases health points of the Keep by 10%.
Lv. 30 212,000 Silver
Rank 2 Increases health points of the Keep by 20%.
Lv. 35 303,000 Silver
Enhance Defense Storage Required: Vitalize 2 Unlocks: None
Mastery Ranks: 2
Rank 1 Allows both the Stockpile and Treasury to perform 20% additional damage when counterattacking during sieges.
Lv. 30 225,000 Silver
Rank 2 Allows both the Stockpile and Treasury to perform 40% additional damage when counterattacking during sieges.
Lv. 50 321,000 Silver
Enhance Defense Keep Required: Enhance Durability Keep Unlocks: None
Mastery Ranks: 2
Rank 1 Allows the Keep itself to perform 20% additional damage when counterattacking during sieges.
Lv. 40 436,000 Silver
Rank 2 Allows the Keep itself to perform 40% additional damage when counterattacking during sieges.
Lv. 50 729,000 Silver
Enhance Formations 1 Required: None Unlocks: Enhance Formations 2
Mastery Ranks: 3
Rank 1 Allows enhancing formation up to level 40.
Lv. 35 356,000 Silver
Rank 2 Allows enhancing formation up to level 50.
Lv. 40 485,000 Silver
Rank 3 Allows enhancing formation up to level 60.
Lv. 45 635,000 Silver
Enhance Formations 2 Required: Enhance Formations 1 Unlocks: None
Mastery Ranks: 3
Rank 1 Allows enhancing formation up to level 70.
Lv. 50 850,000 Silver
Rank 2 Allows enhancing formation up to level 80.
Lv. 55 1,059,000 Silver
Rank 3 Allows enhancing formation up to level 90.
Lv. 60 1,294,000 Silver
Vitalize 1 Required: Commerce 1 Unlocks: Enhance Durability Storage
Mastery Ranks: 1
Rank 1 Increases max energy of commanders by 15.
Lv. 12 22,000 Silver
Vitalize 2 Required: Enhance Durability Storage Unlocks: Enhance Durability Keep, Enhance Defense Storage
Mastery Ranks: 1
Rank 1 Increases max energy of commanders by 30.
Lv. 25 139,000 Silver
Hasten Combat Required: None Unlocks: None
Mastery Ranks: 2
Rank 1 Allows the use of 3x speed during battle.
Lv. 20 49,000 Silver
Rank 2 Allows the use of 4x speed during battle.
Lv. 40
Required: Unlocks:
Mastery Ranks:
Skill Research Conditions
Training Convoy Required: None Unlocks: Training Yellow Turban Soldier
Mastery Ranks: 1
Rank 1 Allows Convoy defense troops in domains.
Lv. 8 3,000 Silver
Training Yellow Turban Soldier Required: Training Convoy Unlocks: Training Y. Archer, Training Y. Warrior, Training Spearman
Mastery Ranks: 2
Rank 1 Allows Yellow Turban Soldier defense troops in domains.
Lv. 10 6,000 Silver
Rank 2 Allows Yellow Turban Spearman defense troops in domains.
Lv. 12 12,000 Silver
Training Yellow Turban Archer Required: Training Y. Soldier Unlocks: Training Crossbowman
Mastery Ranks: 1
Rank 1 Allows Yellow Turban Archer defense troops in domains.
Lv. 10 6,000 Silver
Training Crossbowman Required: Training Y. Archer Unlocks: Training Horse Archer
Mastery Ranks: 1
Rank 1 Allows Crossbowman defense troops in domains.
Lv. 12 9,000 Silver
Training Horse Archer Required: Training Crossbowman Unlocks: Training Artillery
Mastery Ranks: 1
Rank 1 Allows Horse Archer defense troops in domains.
Lv. 15 12,000 Silver
Training Artillery Required: Training Horse Archer Unlocks: None
Mastery Ranks: 1
Rank 1 Allows Artillery defense troops in domains.
Lv. 20 21,000 Silver
Training Spearman Required: Training Y. Soldier Unlocks: Training Tactician
Mastery Ranks: 2
Rank 1 Allows Spearman defense troops in domains.
Lv. 12 9,000 Silver
Rank 2 Allows Heavy Cavalry defense troops in domains.
Lv. 15 15,000 Silver
Training Tactician Required: Training Spearman Unlocks: Training Mountain Cavalry
Mastery Ranks: 3
Rank 1 Allows Scribe defense troops in domains.
Lv. 20 12,000 Silver
Rank 2 Allows Acolyte defense troops in domains.
Lv. 20 18,000 Silver
Rank 3 Allows Devotee defense troops in domains.
Lv. 20 27,000 Silver
Training Mountain Cavalry Required: Training Tactician Unlocks: Training Chariot
Mastery Ranks: 1
Rank 1 Allows Rough Rider defense troops in domains.
Lv. 20 15,000 Silver
Training Chariot Required: Training Mountain Cavalry Unlocks: None
Mastery Ranks: 1
Rank 1 Allows Chariot defense troops in domains.
Lv. 30 21,000 Silver
Training Yellow Turban Warrior Required: Training Y. Soldier Unlocks: Training Dancer
Mastery Ranks: 1
Rank 1 Allows Yellow Turban Warrior defense troops in domains.
Lv. 10 6,000 Silver
Training Dancer Required: Training Y. Warrior Unlocks: Training Bandit
Mastery Ranks: 1
Rank 1 Allows Bard defense troops in domains.
Lv. 12 9,000 Silver
Training Bandit Required: Training Dancer Unlocks: Training Warrior
Mastery Ranks: 2
Rank 1 Allows Bandit defense troops in domains.
Lv. 15 12,000 Silver
Rank 2 Allows First Mate defense troops in domains.
Lv. 22 18,000 Silver
Training Warrior Required: Training Bandit Unlocks: None
Mastery Ranks: 1
Rank 1 Allows Fighter defense troops in domains.
Lv. 20 21,000 Silver
Beast Taming Novice Required: None Unlocks: Beast Taming Intermediate
Mastery Ranks: 5
Rank 1 Allows Locust Swarm defense troops in domains.
Lv. 5 3,000 Silver
Rank 2 Allows Ox defense troops in domains.
Lv. 7 9,000 Silver
Rank 3 Allows Black Ox defense troops in domains.
Lv. 9 18,000 Silver
Rank 4 Allows Wild Boar defense troops in domains.
Lv. 11 30,000 Silver
Rank 5 Allows Black Pig defense troops in domains.
Lv. 13 45,000 Silver
Beast Taming Intermediate Required: Beast Taming Novice Unlocks: Beast Taming Expert
Mastery Ranks: 4
Rank 1 Allows Wolf defense troops in domains.
Lv. 15 6,000 Silver
Rank 2 Allows Leopard defense troops in domains.
Lv. 18 12,000 Silver
Rank 3 Allows Black Panther defense troops in domains.
Lv. 21 21,000 Silver
Rank 4 Allows Tiger defense troops in domains.
Lv. 24 33,000 Silver
Beast Taming Expert Required: Beast Taming Intermediate Unlocks: Beast Taming Master
Mastery Ranks: 3
Rank 1 Allows Brown Bear defense troops in domains.
Lv. 25 9,000 Silver
Rank 2 Allows Grizzly Bear defense troops in domains.
Lv. 29 15,000 Silver
Rank 3 Allows Black Bear defense troops in domains.
Lv. 33 24,000 Silver
Beast Taming Master Required: Beast Taming Expert Unlocks: None
Mastery Ranks: 1
Rank 1 Allows Elephant defense troops in domains.
Lv. 50 12,000 Silver
Training Beast Master Required: None Unlocks: None
Mastery Ranks: 2
Rank 1 Allows Bear Master defense troops in domains.
Lv. 20 15,000 Silver
Rank 2 Allows Tiger Master defense troops in domains.
Lv. 25 21,000 Silver
Summoning Clay Soldier Required: None Unlocks: Summoning Clay General
Mastery Ranks: 4
Rank 1 Allows Clay Soldier defense troops in domains.
Lv. 35 18,000 Silver
Rank 2 Allows Clay Water Soldier defense troops in domains.
Lv. 40 24,000 Silver
Rank 3 Allows Clay Fire Soldier defense troops in domains.
Lv. 40 33,000 Silver
Rank 4 Allows Clay Wind Soldier defense troops in domains.
Lv. 40 45,000 Silver
Summoning Clay General Required: Summoning Clay Soldier Unlocks: None
Mastery Ranks: 4
Rank 1 Allows Clay General defense troops in domains.
Lv. 45 21,000 Silver
Rank 2 Allows Clay Water General defense troops in domains.
Lv. 50 27,000 Silver
Rank 3 Allows Clay Fire General defense troops in domains.
Lv. 50 36,000 Silver
Rank 4 Allows Clay Wind General defense troops in domains.
Lv. 50 48,000 Silver


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