Propeller - Humankind

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Propeller is an Industrial Era technology in Humankind. Cannot be boosted.

Place in the tech tree[]

Prerequired

Leads to

Combustion Engine

Unlocks[]

Steam Frigate.png

Steam Frigateunit

Ironcladunit

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Whale Fishinginfrastructure

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Seafood Wholesalersinfrastructure

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Ancient Era	Calendar • Domestication • Carpentry • City Defense • Irrigation • Fishing • Masonry • Bronze-working • Writing • Wheel • Sailing • Organized Warfare

Classical Era	Philosophy • Hydrology • Trade Expeditions • Fortifications • Standing Army • Rhetoric • Conquest • Craftsmanship • Mounted Warfare • Foreign Outposts • Imperial Power • Siege Tactics

Medieval Era	Theology • Feudalism • War Summons • Seafaring Mastery • Chivalry • Heavy Infantry • Military Architecture • Alchemy • Guilds • Furnace Steel

Early Modern Era	Three-Masted Ship • Naval Artillery • Centralized Power • Gunpowder Warfare • Movable Typeface • Chartered Companies • Humanism • Supply Lines • Siege Cannons • Mercantilism • Flintlock

Industrial Era	Encyclopedia • Carbine • Steam Engine • Military Coordination • Scientific Method • Nationhood • Line Formation • Propeller • Mechanization • Electricity • Combustion Engine • Microbiology • Urban Planning • Guerilla Warfare • Aeronautics • Wireless Telegraphy • Trench Warfare

Contemporary Era	Aerial Warfare • Research Institute • Continuous Track • Naval Air Strategy • Amphibious Warfare • Radar • Civil Engineering • Insurrection Theory • Uranium Enrichment • Free Trade Agreement • Computing • Power Lines • Nuclear Fission • Social Housing • Suburbs • Rocket Science • Renewable Energy • Communication Satellites • Mass Entertainment • Covert Ops • World-Wide Web • Space Orbital • Neural Implant • Exosuit • Military Laser • Fusion Reactor • Composite Armor • Automation • Mechanized Harvesting • Fighter Jets

Removed	Horsemanship

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