Roman Expedition technologies
The civil and military research trees of Roman Expedition (Roman, The Last Roman), line by line as the game lays them out. Hover or tap a technology for its research points, gold per turn, effects, the buildings it unlocks and what it needs first. Roman Expedition units.
COMPUTEDBoth trees together cost 35,700 research points. Each tooltip also shows what reaching that technology costs: its own points plus every technology it needs first, each counted once. Before research-rate bonuses.
Civil technologies (24)
Uninterrupted BusinessUninterrupted Business500 research points · 1,400 research points to reach it (cheapest route)
Wealth: +5% from commercial buildingsWealth: +5% from expedition commercial buildingsRequires: Long Lease ContractsThe business of business must always continue.
Local SupportLocal Support900 research points · 3,800 research points to reach it (cheapest route)Requires: Imperial Logothetes, Uninterrupted BusinessWhether it be for land, or the hearts and minds of its occupants, there is always a battle.
Recodified Roman LawsRecodified Roman Laws1,100 research points · 4,900 research points to reach it (cheapest route)
Growth: +2Expedition Growth: +2Requires: Local SupportIf you know where you've been, you can control where you're going.
Price of NeutralityPrice of Neutrality100 research points · 5,000 research points to reach it (cheapest route)
Construction cost: -15% for civic buildingsWealth: +10% from commercial buildingsWealth: +10% from expedition commercial buildingsRequires: Recodified Roman LawsCosts 32,500 gold per turn while researched. The freedom to stand apart comes at a price.
Long Lease ContractsLong Lease Contracts400 research points · 900 research points to reach it (cheapest route)Requires: Codification of LawsAgreements, like lives, are ephemeral things.
Specialised IndustrySpecialised Industry600 research points · 1,500 research points to reach it (cheapest route)Requires: Long Lease ContractsA potter is the best man for his job, so why call a blacksmith?
Imperial LogothetesImperial Logothetes900 research points · 2,400 research points to reach it (cheapest route)
Tax rate: +3%Requires: Specialised IndustryBureaucracy is a hated, but necessary, evil.
State MonopoliesState Monopolies1,500 research points · 3,900 research points to reach it (cheapest route)Construction cost: -5% for farm buildings
Wealth: +5% from agricultural buildingsRequires: Imperial LogothetesOnly the state can ensure its citizens' interests are served.
Greek Philisophical RevivalGreek Philisophical Revival200 research points
Public order: +2 from bureaucratic reformsWhen in Greece, immerse yourself in its culture.
Codification of LawsCodification of Laws300 research points · 500 research points to reach it (cheapest route)Tax rate: +2%Requires: Greek Philisophical RevivalTo inscribe a law is to carve it in marble.
Imperial ChurchImperial Church700 research points · 3,100 research points to reach it (cheapest route)
Religious influence: +1 state religionRequires: Hereditary Offices, Specialised IndustryState and Church together are stronger than the sum of their parts.
Canonical LawCanonical Law1,000 research points · 4,100 research points to reach it (cheapest route)Religious influence: +1 state religionRequires: Imperial ChurchHis word literally is the law.
Divine RightDivine Right100 research points · 4,200 research points to reach it (cheapest route)Construction cost: -20% for religious buildingsReligious influence: +1 state religionRequires: Canonical LawCosts 10,000 gold per turn while researched. No earthly authority sits above the Emperor, nor escapes his will.
Pragmatic SanctionPragmatic Sanction800 research points · 5,200 research points to reach it (cheapest route)
Political action cost: -25% personal influence (all characters)
Political incidents: -25% chance of occuringPublic order: +2 from bureaucratic reformsRequires: Architectural RenovationLocal government gives people a sense of self-determination, however far from the truth that may be.
Gloria RomanoriumGloria Romanorium2,200 research points · 10,000 research points to reach it (cheapest route)Tax rate: +5%Growth: +2Expedition Growth: +2Requires: Architectural Renovation, State MonopoliesThe treasures of the Empire, restored at last to their rightful owners.
Specialised CraftsmenSpecialised Craftsmen400 research points · 900 research points to reach it (cheapest route)Construction cost: -3% for main settlement buildingsConstruction cost: -3% for main settlement buildings (all forces)Requires: Codification of LawsThere is no better service than from one who knows his craft.- Hereditary OfficesHereditary Offices500 research points · 1,400 research points to reach it (cheapest route)Wealth: +5% from industrial buildingsWealth: +5% from expedition industrial buildingsRequires: Specialised CraftsmenLike father, like son. All serve the Empire one way or another.
Craft OrganisationsCraft Organisations700 research points · 2,100 research points to reach it (cheapest route)Construction cost: -5% for industrial buildingsRequires: Hereditary OfficesWhere one may fail, many will succeed.
State Construction ProgrammeState Construction Programme1,000 research points · 3,100 research points to reach it (cheapest route)Requires: Craft OrganisationsThe spectacle of the Empire is immortalised in its buildings.
Architectural RenovationArchitectural Renovation1,300 research points · 4,400 research points to reach it (cheapest route)Requires: State Construction ProgrammeGreat construction works remind people who rules.
Regional TraditionsRegional Traditions500 research points · 1,400 research points to reach it (cheapest route)Construction cost: -5% for agricultural buildingsWealth: +5% from agricultural and animal husbandry buildingsRequires: Specialised CraftsmenPeople respond well to the observance of tradition's rituals.
Repair of DefencesRepair of Defences800 research points · 3,400 research points to reach it (cheapest route)Construction cost: -7% for main settlement buildingsConstruction time: -1 for main settlement buildingsConstruction cost: -7% for main settlement buildings (all forces)Construction time: -1 for main settlement buildings (all forces)Requires: Craft Organisations, Regional TraditionsHe who applies himself with vigour may yet triumph.
Conqueror's GenerosityConqueror's Generosity1,200 research points · 4,300 research points to reach it (cheapest route)
Resistance to occupation: -10%Wealth: +15% from cultural buildingsWealth: +15% from expedition cultural buildingsRequires: State Construction ProgrammeThe true benefits of mercy are felt for years after the act.
Reconquest DirectiveReconquest Directive100 research points · 4,400 research points to reach it (cheapest route)Wealth: +5% from industrial buildingsPublic order: +4 from bureaucratic reformsWealth: +5% from expedition industrial buildingsRequires: Conqueror's GenerosityCosts 32,500 gold per turn while researched. A mandate from the Emperor to reconquer the world. What general could ask for more?
Military technologies (24)
Eastern Heavy Cavalry TacticsEastern Heavy Cavalry Tactics500 research points · 1,400 research points to reach it (cheapest route)
Ammunition: +10% for missile cavalry
Unit experience: +1 for cavalry unit recruitsRequires: Military RegionalisationThe terrifying thunder of eastern cavalry, adapted for western purposes.
Mercenary ExploitationMercenary Exploitation800 research points · 2,900 research points to reach it (cheapest route)Recruitment cost: -15% for mercenary units (all characters)
Upkeep cost: -30% for mercenary unitsRequires: Billeting, Eastern Heavy Cavalry Tactics"We can pay you two thousand now, plus fifteen when we win."
Emergency SuppliesEmergency Supplies100 research points · 2,600 research points to reach it (cheapest route)
Replenishment: +5%Requires: Improved GarrisoningCosts 32,500 gold per turn while researched. A good general thinks laterally in the field.
Military RegionalisationMilitary Regionalisation400 research points · 900 research points to reach it (cheapest route)Requires: Military ProvisionsSmaller, better, faster, stronger.
BilletingBilleting700 research points · 1,600 research points to reach it (cheapest route)Upkeep cost: -7% for all unitsRequires: Military RegionalisationIt is sensible to receive armed men warmly.
Improved GarrisoningImproved Garrisoning900 research points · 2,500 research points to reach it (cheapest route)Attrition: -30% when under siege (all forces)Requires: BilletingMen, like iron, can be hammered into whatever shape is required.
Defence in DepthDefence in Depth1,500 research points · 4,000 research points to reach it (cheapest route)Unit experience: +1 for all recruitsMissile attack rate: +10 for siege unitsRequires: Improved GarrisoningIn order to take ground, you must first give it.
Military StandardisationMilitary Standardisation200 research pointsUpkeep cost: -3% for all unitsArmed, armoured and drilled the same, an army becomes a machine.
Military ProvisionsMilitary Provisions300 research points · 500 research points to reach it (cheapest route)Requires: Military StandardisationAn army marches on its rations, and well-made boots.
Federate ForcesFederate Forces600 research points · 1,500 research points to reach it (cheapest route)
Charge bonus: +5%
Fatigue rate: -20%Requires: Military RegionalisationThey are not Romans, but fight as if they were. Rome can ask no more.
Traditions of StrategyTraditions of Strategy100 research points · 2,500 research points to reach it (cheapest route)
Recruitment capacity: +2Battle movement speed: +5%Recruitment capacity: +2 when hording.Requires: Federate Forces, Weapon ManufactoriesCosts 10,000 gold per turn while researched. The old ways are usually the best.
Imperial Transport ServiceImperial Transport Service800 research points · 2,900 research points to reach it (cheapest route)
Integrity: +1Requires: Militarised SocietyFrom shore to shore, across road or mountain, the Empire will get you there.
Improved Water StorageImproved Water Storage1,000 research points · 5,900 research points to reach it (cheapest route)
Immune to seasicknessRequires: Imperial Transport Service, Improved GarrisoningWater is life, so it makes sense to look after it.
Advanced Naval ManoeuvresAdvanced Naval Manoeuvres1,200 research points · 7,100 research points to reach it (cheapest route)
Campaign movement range: +10%Requires: Improved Water StorageThinking on your feet ensures everyone else stays on theirs.
Strategos AutokratorStrategos Autokrator2,200 research points · 10,200 research points to reach it (cheapest route)Requires: Defence in Depth, Foreign KnowledgeThere is a time, and a man, for decisive action.
Language of ComradeshipLanguage of Comradeship400 research points · 900 research points to reach it (cheapest route)Integrity: +1Requires: Military Provisions"By all that you hold dear on this good earth, I bid you stand!"
Weapon ManufactoriesWeapon Manufactories500 research points · 1,400 research points to reach it (cheapest route)Recruitment cost: -10%Ammunition: +10%Requires: Language of ComradeshipMass-made weaponry is not an art, it is a science.
Militarised SocietyMilitarised Society700 research points · 2,100 research points to reach it (cheapest route)Requires: Weapon ManufactoriesThe will of the army is furnished by the work of the people.
Order & DisciplineOrder & Discipline1,000 research points · 3,100 research points to reach it (cheapest route)Requires: Militarised SocietyA well-drilled army, that does not loot, softens the blow of conquest.
Foreign KnowledgeForeign Knowledge1,400 research points · 4,500 research points to reach it (cheapest route)Requires: Order & DisciplineUnderstanding a culture is the first step towards defeating it.
Defensive LogisticsDefensive Logistics700 research points · 2,100 research points to reach it (cheapest route)Requires: Weapon ManufactoriesVictory in the field and in the balance books.
Forced CapitulationForced Capitulation800 research points · 3,600 research points to reach it (cheapest route)
Enables construction of medium siege engines
Enemy siege holdout time: -1 (double for city-ports)Requires: Defensive Logistics, Militarised SocietyWhen troops are in short supply, but time is not, starve out your enemy. Works every time.
Besieged SocietyBesieged Society1,000 research points · 4,600 research points to reach it (cheapest route)Enables construction of heavy siege engines
Siege holdout time: +1 (double for city-ports)Ammunition: +25% during siege defence battlesRequires: Forced CapitulationWhere there's a will, there's a way. In all things.
Advanced Siege StratagemAdvanced Siege Stratagem100 research points · 4,700 research points to reach it (cheapest route)Requires: Besieged SocietyCosts 32,500 gold per turn while researched. Think outside the box if you wish to break into it.
From technology_node_sets, technology_nodes (with this faction's own nodes in place of the shared ones), technology_node_links, technology_effects_junction and building_level_required_technology_junctions (Steam build 25370302).