# Icon Credits

Flag Icons made by [Freepik](https://www.flaticon.com/authors/freepik) from [www.flaticon.com](https://www.flaticon.com) 
 and licensed by Creative Commons 3.0

All the following are from [the Noun Project](https://thenounproject.com) licenced under either Creative Commons or Public Domain


## Units

### Ancient Era

* [Hammer](https://thenounproject.com/search/?q=Hammer&i=667666) By Hea Poh Lin for Worker
* [Flag](https://thenounproject.com/search/?q=Flag&i=50114) By Melvin Poppelaars for Settler
* [Eagle](https://thenounproject.com/search/?q=Eagle&i=1619932) By anggun for Scout
* [Axe](https://thenounproject.com/search/?q=Axe&i=1688143) By ehab.abdullah for Warrior
* [Bow And Arrow](https://thenounproject.com/search/?q=Bow%20and%20Arrow&i=338261) By Viktor Ostrovsky for Archer
* [Bow](https://thenounproject.com/search/?q=bow&i=101736) By Arthur Shlain for Bowman
* [Fishing Vessel](https://thenounproject.com/term/fishing-vessel/23815/) By Luis Prado for Work Boats
* [Greek Trireme](https://thenounproject.com/search/?q=ancient%20boat&i=1626303) By Zachary McCune for Trireme
* [Chariot](https://thenounproject.com/search/?q=Chariot&i=1189930) By Andrew Doane for Chariot Archer
* [Spear](https://thenounproject.com/search/?q=Spear&i=11432) By Stephen Copinger for Spearman
* [Greek shield](https://thenounproject.com/search/?q=hoplite&i=440135) for Hoplite

### Classical Era

* [Catapult](https://thenounproject.com/search/?q=Spear&i=1233840) By Jakub Ukrop
* [Unloaded Crossbow](https://thenounproject.com/term/unloaded-crossbow/815992/) By Hamish as Ballista
* [Sword](https://thenounproject.com/search/?q=Sword&i=1215443) By Guilherme Furtado for Swordsman
* [Horse](https://thenounproject.com/search/?q=Horse&i=1373793) By AFY Studio for Horseman
* [Horse Head](https://thenounproject.com/search/?q=Cavalry&i=374037) By Juan Pablo Bravo for Companion Cavalry

### Medieval Era

* [Ship](https://thenounproject.com/term/ship/1998589/) By Vanisha for Galleass 
* [Crossbow](https://thenounproject.com/term/crossbow/965389/) By Creaticca Creative Agency for Crossbowman
* [Longbow](https://thenounproject.com/search/?q=longbow&i=815991) By Hamish for Longbowman
* [Trebuchet](https://thenounproject.com/search/?q=Trebuchet&i=827987) By Ben Davis
* [Sword](https://thenounproject.com/search/?q=Sword&i=1432662) By uzeir syarief for Longswordsman
* [Spear](https://thenounproject.com/search/?q=Spear&i=1233840) By Alvaro Cabrera for Pikeman
* [Knight](https://thenounproject.com/search/?q=Knight&i=30912) By Tyler Glaude

### Renaissance Era

* [Sail boat](https://thenounproject.com/term/sail-boat/5292/) By Alessandro Suraci for Caravel
* [Cannon](https://thenounproject.com/search/?q=Cannon&i=1618747) By Orin Zuu
* [Musket](https://thenounproject.com/search/?q=Musket&i=298302) By Cezary Lopacinski for Musketman
* [Black powder musket](https://thenounproject.com/term/black-powder-musket/1202078/) By Jarem Fyre for Minuteman
* [Rapier](https://thenounproject.com/search/?q=musketeer&i=819822) By Hamish for Musketeer
* [Ship](https://thenounproject.com/term/ship/1293899/) By Orin Zuu for Frigate
* [Lance](https://thenounproject.com/search/?q=Lance&i=440122) By parkjisun for Lancer

### Industrial

* [Rifle](https://thenounproject.com/search/?q=Rifle&i=604291) By Chameleon Design for Rifleman
* [Horse](https://thenounproject.com/search/?q=Horse&i=1023745) By Bakunetso Kaito for Cavalry
* [Artillery](https://thenounproject.com/search/?q=Artillery&i=1165261) By Creative Mania
* [Ship](https://thenounproject.com/term/ship/1594793/) By Aisyah for Ironclad

### Modern

* [Helmet](https://thenounproject.com/term/helmet/25216/) By Daniel Turner for Great War Infantry
* [Tank](https://thenounproject.com/term/tank/1287510/) By corpus delicti for Landship
* [Warship](https://thenounproject.com/term/warship/1597474/) By zidney for Destroyer
* [Battleship](https://thenounproject.com/search/?q=battleship&i=1986807) By Vitaliy Gorbachev, KZ for Battleship
* [Submarine](https://thenounproject.com/search/?q=submarine&i=589519) By Hea Poh Lin, MY

### Great People

* [Pallet](https://thenounproject.com/search/?q=Pallet&i=6862) By James Keuning for Great Artist
* [Gear](https://thenounproject.com/search/?q=Gear&i=17369) By Melvin Salas for Great Engineer
* [Beaker](https://thenounproject.com/search/?q=Beaker&i=621510) By Delwar Hossain for Great Scientist
* [General](https://thenounproject.com/search/?q=general&i=933566) By anbileru adaleru for Great General

## Resources

* [Saffron](https://thenounproject.com/term/saffron/1576606/) By parkjisun for Dye
* [Can](https://thenounproject.com/term/can/708971/) By Nick Bluth for Aluminum
* [Coal](https://thenounproject.com/term/coal/213892/) By Michael Wohlwend
* [Anvil](https://thenounproject.com/term/anvil/166414/) By Jason Dilworth for Iron
* [Deer](https://thenounproject.com/term/deer/338013/) By Richard Nixon
* [Banana](https://thenounproject.com/term/banana/1262865/) By Adrian Coquet
* [Oil](https://thenounproject.com/term/oil/88649/) By Tiago Maricate
* [Statue](https://thenounproject.com/term/statue/5221/) By Joris Hoogendoorn for Marble
* [Ribbon](https://thenounproject.com/term/ribbon/418996) By Anton for Silk
* [Stone](https://thenounproject.com/term/stone/1373902/) By AFY Studio
* [Goblet](https://thenounproject.com/term/goblet/1005208/) By Pedro Santos for Silver
* [Sugar](https://thenounproject.com/term/sugar/1689203/) By ahmad
* [Spice](https://thenounproject.com/term/spice/1689206/) By ahmad
* [Radiation symbol](https://thenounproject.com/term/radiation-symbol/211059/) By icon 54 for Uranium
* [Wine](https://thenounproject.com/term/wine/1290951/) By Adrien Coquet
* [Wheat](https://thenounproject.com/term/wheat/1048428/) By Juraj Sedlak
* [Sheep](https://thenounproject.com/term/sheep/8389/) By Unrecognized
* [Elephant](https://thenounproject.com/term/elephant/1853192/) By Kelsey Armstrong for Ivory
* [Cattle](https://thenounproject.com/term/cattle/781342/) By Daniela Baptista
* [Leather](https://thenounproject.com/term/leather/16499/) By Alen Krummenacher for Furs
* [Gem](https://thenounproject.com/term/gem/948920/) By Lluisa Iborra
* [Joss Stick](https://thenounproject.com/search/?q=incense&i=583033) By Hea Poh Lin for Incense

## Improvements 

* [Woodcutting axe](https://thenounproject.com/term/woodcutting-axe/1060560/) By Chanut is Industries for Lumber Mill
* [Monument](https://thenounproject.com/term/monument/1175928/) By Setyo Ari Wibowo for Landmark
* [Farm](https://thenounproject.com/term/farm/25362/) By Bonnie Beach
* [Unhappy](https://thenounproject.com/term/unhappy/116793/) By Daryl Vandermont (doesn't belong here)
* [Bank](https://thenounproject.com/term/bank/1648569/) By Scott Dunlap for Customs House
* [Academy](https://thenounproject.com/term/academy/1689703/) By CJS
* [Factory](https://thenounproject.com/term/factory/1049531/) By RULI for Manufactory
* [Mine](https://thenounproject.com/term/mine/543/) By Edward Boatman
* [Corral](https://thenounproject.com/term/corral/1340751/) By Luis Prado for Pasture
* [Plants](https://thenounproject.com/term/plants/1760916/) By hendra sudibyo for Plantation
* [Pickaxe](https://thenounproject.com/term/pickaxe/175792/) By Creative Stall for Quarry
* [Food stall](https://thenounproject.com/term/food-stall/1618358/) By I Putu Kharismayadi for Trading post
* [Road](https://thenounproject.com/term/road/1600491/) By REVA
* [Ruins](https://thenounproject.com/term/ruins/175277/) By Creative Stall for Ancient runs
* [Ruins](https://thenounproject.com/term/ruins/3849/) By Paulo Volkova for City ruins
* [Fishing Net](https://thenounproject.com/term/fishing-net/1073133/) By Made for Fishing Boats

## Buildings

### Ancient Era

* [Storehouse](https://thenounproject.com/term/storehouse/966786/) By Pedro Santos for Granary
* [Great Wall Of China](https://thenounproject.com/term/great-wall-of-china/146039/) By Arthur Shlain for Walls
* [Block](https://thenounproject.com/term/block/1711553/) By Monjin Friends for Stone Works
* [korean palace](https://thenounproject.com/term/korean-palace/1797542/) By 1516 for Palace
* [Obelisk](https://thenounproject.com/term/obelisk/749104/) By Eliricon for Monument
* [Cross swords](https://thenounproject.com/term/cross-swords/965398/) By  Creaticca Creative Agency for Barracks
* [Fortress](https://thenounproject.com/search/?q=fortress&i=146989) By Creative Stall for Krepost
* [Paper](https://thenounproject.com/term/paper/1443472/) By anam
* [Circus](https://thenounproject.com/term/circus/743734/) By Ralph Schmitzer
* [Stonehenge](https://thenounproject.com/term/stonehenge/543289/) By icon 54

### Classical Era

* [Lighthouse](https://thenounproject.com/search/?q=lighthouse&i=866966) By Dolly Holmes
* [Lighthouse](https://thenounproject.com/term/lighthouse/583069/) By Hea Poh Lin for The Great Lighthouse
* [Temple](https://thenounproject.com/term/temple/1808407/) By 1516
* [Anubis](https://thenounproject.com/term/anubis/1080090/) By Carpe Diem for Burial Tomb
* [Parthenon](https://thenounproject.com/term/parthenon/493272/) By Christopher T. Howlett for The Oracle
* [Stadium](https://thenounproject.com/term/stadium/1500595/) By sandra for Colloseum
* [Stadium](https://thenounproject.com/term/stadium/1152530/) By Creaticca Creative Agency for Circus Maximus
* [Market](https://thenounproject.com/term/market/1723050/) By sofi
* [Bazaar](https://thenounproject.com/term/bazaar/902288/) By Tokka Elkholy
* [Shekel Coin](https://thenounproject.com/term/shekel-coin/204154/) By Till Teenck for Mint
* [Aqueduct](https://thenounproject.com/term/aqueduct/24639/) By Arthur Shlain
 
### Medieval Era

* [College](https://thenounproject.com/term/college/129978/) By Alexander Skowalsky for University
* [College](https://thenounproject.com/term/college/1203703/) By Vectors Market for National College
* [Chichen Itza](https://thenounproject.com/term/chichen-itza/668065/) By Hea Poh Lin
* [Christian Church](https://thenounproject.com/term/christian-church/1174183/) By Andrejs Kirma for Monastery
* [Cambodia](https://thenounproject.com/term/cambodia/1809152/) By Wichai Wi for Angkor Wat
* [Books](https://thenounproject.com/term/books/1140218/) By Abir Alward for Oxford University
* [Forge](https://thenounproject.com/term/forge/1044767/) By Monjin Friends
* [Anchor](https://thenounproject.com/term/anchor/1258518/) By Saeful Muslim for Harbor
* [Hand saw](https://thenounproject.com/term/hand-saw/990902/) By b farias for Workshop
* [Hagia Sophia](https://thenounproject.com/term/hagia-sophia/1907752/) By Felipe Alvarado
* [Factory](https://thenounproject.com/term/factory/1624235/) By Maxim Kulikov for Ironworks
* [Notre Dame](https://thenounproject.com/term/notre-dame/1361725/) By Marco Livolsi
* [Bullets](https://thenounproject.com/term/bullets/810156/) By Aldric Rodriguez for Armory 
* [Machu Pichu](https://thenounproject.com/term/machu-picchu/1569706/) By Carpe Diem

### Renaissance Era

* [Museum](https://thenounproject.com/term/museum/803560/) by zidney
* [Hermitage](https://thenounproject.com/term/hermitage/133969/) By Yuri Mamaev
* [The Louvre](https://thenounproject.com/term/the-louvre/1577539/) By roundicons.com
* [Forbidden City](https://thenounproject.com/term/forbidden-city/1797540/) By 1516
* [Theatre](https://thenounproject.com/term/theatre/1780401/) By b farias
* [Tower of Pisa](https://thenounproject.com/search/?q=leaning%20tower%20of%20pisa&i=1002578) By Pedro Santos
* [Windmill](https://thenounproject.com/term/windmill/1705107/) By corpus delicti
* [Taj Mahal](https://thenounproject.com/term/taj-mahal/1907755/) By Felipe Alvarado
* [Observatory](https://thenounproject.com/term/observatory/1259/) By Nathan Driskell
* [Opera House](https://thenounproject.com/term/opera-house/446672/) By Xinh Studio
* [Chinese traditional tower](https://thenounproject.com/term/chinese-traditional-tower/1808410/) By 1516 for Porcelain Tower
* [Bank](https://thenounproject.com/term/bank/1882194/) By projecthayat
* [Harbor](https://thenounproject.com/term/harbor/225583/) By Rflor for Seaport

### Industrial Era

* [Books](https://thenounproject.com/term/books/1767500/) By Minh Do for Public School
* [Hospital](https://thenounproject.com/term/hospital/1658509/) By Adrien Coquet
* [Stock exchange](https://thenounproject.com/term/stock-exchange/1210199/) By Pundimon
* [Military](https://thenounproject.com/term/military/1857519/) By myiconfinder for Military Academy
* [Factory](https://thenounproject.com/term/factory/545906/) By icon 54
 
### Modern Era

* [Stadium](https://thenounproject.com/term/stadium/13872/) By Karuna Lalvani
* [Signal Tower](https://thenounproject.com/term/signal-tower/1547758/) By Nociconist for Broadcast Tower
* [Eiffel Tower](https://thenounproject.com/term/eiffel-tower/1907757/) By Felipe Alvarado
* [Statue of Liberty](https://thenounproject.com/search/?q=statue%20of%20liberty&i=1801199) By 1516
* [Christ the redeemer](https://thenounproject.com/term/christ-the-redeemer/56112/) By Stefan Spieler for Cristo Redentor

### Information Era

* [Chemistry](https://thenounproject.com/term/chemistry/175847/) By Creative Stall for Medical Lab
* [Microscope](https://thenounproject.com/term/microscope/1452362/) By Arafat Uddin for Research Lab
* [Water dam](https://thenounproject.com/term/water-dam/1002726/) By Symbolon for Hydro Plant
* [Solar panel](https://thenounproject.com/term/solar-panel/1131/) By Modik for Solar Plant
* [Opera House Sydney](https://thenounproject.com/term/opera-house-sydney/1626283/) By Pham Duy Phuong Hung for Sydney Opera House
* [Spaceship](https://thenounproject.com/term/spaceship/1444621/) By Dinosoft Labs for Apollo Program
* [Build](https://thenounproject.com/term/build/1156478/) By Michael G Brown for Spaceship Factory
* [Nuclear Plant](https://thenounproject.com/term/nuclear-plant/1132340/) By Andrejs Kirma

### Future Era

* [Missile](https://thenounproject.com/term/missile/799922/) By ProSymbols for SS Booster
* [Rocket](https://thenounproject.com/term/rocket/937173/) By BomSymbols for SS Cockpit
* [Engine](https://thenounproject.com/term/engine/1877958/) By Andre for SS Engine
* [Chamber](https://thenounproject.com/term/chamber/1242689/) By IYIKON for SS Stasis Chamber

## Social Policies

### Tradition

* [coat of arms](https://thenounproject.com/term/coat-of-arms/366462/) By Martina Krasnayova for Oligarchy
* [Apple](https://thenounproject.com/term/apple/1916523/) By EnQiu for Landed Elite
* [Crown](https://thenounproject.com/term/crown/1567484/) By Alexander Skowalsky for Monarchy
* [Pyramid](https://thenounproject.com/term/pyramid/175066/) By Creative Stall for Aristocracy
* [Gavel](https://thenounproject.com/term/gavel/225541/) By Rflor for Legalism


### Liberty

* [People](https://thenounproject.com/term/people/199814/) By Elizabeth Lopez for Citizenship
* [Assembly](https://thenounproject.com/term/assembly/468455/) By  Noël Rasendrason for Republic
* [People](https://thenounproject.com/term/people/670317/) By Gregor Cresnar for Meritocracy
* [People](https://thenounproject.com/term/people/1355818/) By Wilson Joseph for Representation
* [Torch](https://thenounproject.com/term/torch/589999/) By Hea Poh Lin for Collective Rule

### Honor

* [Sword](https://thenounproject.com/term/sword/5111/) By dsathiyaraj for Military Tradition
* [Castle](https://thenounproject.com/term/castle/55045/) By Gabriele Malaspina for Military Caste
* [Roman Armor](https://thenounproject.com/term/roman-armor/440138/) By Parkjisun for Professional Army
* [Shield](https://thenounproject.com/term/shield/874633/) By Kimmi Studio for Discipline
* [Spartan Helmet](https://thenounproject.com/term/spartan-helmet/1732615/) By Joni Ramadhan for Warrior Code

### Piety

* [Protestantism](https://thenounproject.com/term/protestantism/1524922/) By Evgeni Moryakov for Reformation
* [Temple](https://thenounproject.com/term/temple/95523/) By N.K.Narasimhan for Theocracy
* [Religion](https://thenounproject.com/term/religion/1307794/) By Ben Avery for Free Religion
* [Flame](https://thenounproject.com/term/flame/633228/) By Ian Shoobridge for Mandate Of Heaven

### Commerce

* [Trade](https://thenounproject.com/term/trade/686718/) By Gregor Cresnar for Trade Unions
* [Pie Chart](https://thenounproject.com/term/pie-chart/1284359/) By Adrien Coquet  for Protectionism
* [Coins](https://thenounproject.com/term/coins/1915881/) By icon 54 for Mercantilism
* [Painting](https://thenounproject.com/term/painting/387146/) By Mike Rowe for Patronage
* [Gem](https://thenounproject.com/term/gem/754533/) By Oksana Latysheva for Entrepreneurship

### Rationalism

* [Science](https://thenounproject.com/term/science/1788338/) By Three Six Five for Scientific Revolution
* [Graph](https://thenounproject.com/term/graph/1329095/) By Ben Davis for Secularism
* [Logic](https://thenounproject.com/term/logic/1269994/) By Jenya K for Sovereignty
* [Dialogue](https://thenounproject.com/term/dialogue/1867557/) By ProSymbols for Free Thought
* [Logic](https://thenounproject.com/term/logic/718608/) By Arthur Shlain for Humanism

### Freedom

* [social network](https://thenounproject.com/term/social-network/746002/) By Kirby Wu for Civil Society
* [Gender Equality](https://thenounproject.com/term/gender-equality/577561/) By corpus delicti for Universal Suffrage
* [Feather](https://thenounproject.com/term/feather/1628/) By Eduardo Souza for Constitution
* [Voting](https://thenounproject.com/term/voting/981735/) By Nikita Kozin for Democracy
* [Mic](https://thenounproject.com/term/mic/1666564/) By Aybige for Free Speech

### Autocracy

* [War](https://thenounproject.com/term/war/1643541/) By Abdul Karim for Total War
* [Military Grade](https://thenounproject.com/term/military-grade/578687/) By Ben Davis for Militarism
* [Military Medal](https://thenounproject.com/term/military-medal/396457/) By iconsphere for Facism
* [Newspaper](https://thenounproject.com/term/newspaper/1207487/) By Trishul for Populism
* [Riot Police](https://thenounproject.com/term/riot-police/43117/) By Dan Hetteix for Police State



## Technologies

### Ancient
* [Agriculture](https://thenounproject.com/term/agriculture/4221/) By OCHA Visual Information Unit
* [Jug](https://thenounproject.com/term/jug/869999/) By Vladimir Belochkin for Pottery
* [Archery](https://thenounproject.com/term/archery/213836/) By icon 54
* [Mining](https://thenounproject.com/term/mining/1400713/) By art shop
* [Sailing](https://thenounproject.com/term/sailing/783193/) By Daniela Baptista
* [Sundial](https://thenounproject.com/term/sundial/239627/) By Bonegolem for Calendar
* [Cuneiform](https://thenounproject.com/term/cuneiform/86669/) By Michael Wohlwend for Writing
* [Trap](https://thenounproject.com/term/trap/130049/) By Sergey Demushkin for Trapping
* [innovative](https://thenounproject.com/term/innovative/30219/) By Matt Brooks for The Wheel
* [Bricks](https://thenounproject.com/term/bricks/1018659/) By Vaibhav Radhakrishnan for Construction
* [Mallet](https://thenounproject.com/term/mallet/1306669/) By Ben Avery for Bronze Working

### Classical
* [Telescope](https://thenounproject.com/term/telescope/1932888/) for Optics 
* [Horse Riding](https://thenounproject.com/term/horse-riding/583093/) By Hea Poh Lin for Horseback Riding
* [Abacus](https://thenounproject.com/term/abacus/1943303/) By Yo! Baba for Mathematics
* [Arch](https://thenounproject.com/term/arch/1174168/) By Andrejs Kirma for Construction
* [Brain](https://thenounproject.com/term/brain/64073/) By Tony Gines for Philosophy
* [Coins](https://thenounproject.com/term/coins/1806100/) By Adrien Coquet for Currency
* [Engineering Blueprint](https://thenounproject.com/term/engineering-blueprint/1588543/) By Sachin Modgekar for Engineering
* [Metalworking](https://thenounproject.com/term/metalworking/1561383/) By Symbolon for Iron Working

### Medieval
* [Judaism](https://thenounproject.com/term/judaism/324145/) By Ben Davis for Theology
* [Institution](https://thenounproject.com/term/institution/260586/) By Luis Prado for Civil Service
* [Compass](https://thenounproject.com/term/compass/821505/) By Bernar Novalyi
* [Education](https://thenounproject.com/term/education/1817512/) By Tomas Knopp
* [Casting](https://thenounproject.com/term/casting/10773/) By Jasmine Rae Friedrich
* [Bar association](https://thenounproject.com/term/bar-association/217443/) By Miroslav Kurdov for Guilds
* [Knight](https://thenounproject.com/term/knight/1026633/) By Robert Bjurshagen for Chivalry
* [Camel](https://thenounproject.com/search/?q=camel&i=1210751) By Orin Zuu for Camel Archer
* [Machinery](https://thenounproject.com/term/machinery/1170931/) By Greenhill
* [Lever](https://thenounproject.com/term/lever/4927/) By Jakob Ukrop for Physics
* [Sword](https://thenounproject.com/term/sword/1365080/) By Jonathan P Lambert for Steel

### Renaissance
* [Telescope](https://thenounproject.com/term/telescope/1976706/) By ProSymbols for Astronomy
* [Sound waves](https://thenounproject.com/term/sound-waves/792661/) By Makarenko Andrey for Acoustics
* [Banking](https://thenounproject.com/term/banking/763867/) By Delwar Hossein
* [Printing Press](https://thenounproject.com/term/printing-press/11880/) By Mike Wirth
* [Flintlock](https://thenounproject.com/term/flintlock/1122659/) By Madison Apple for Gunpowder 
* [Fossil](https://thenounproject.com/term/fossil/168650/) By Raf Verbraeken for Archaeology
* [Sextant](https://thenounproject.com/term/sextant/313438/) By lastspark for Navigation
* [Architecture](https://thenounproject.com/term/architecture/795297/) By Andrew Doane
* [Money Growth](https://thenounproject.com/search/?q=economic%20model&i=136159) By DesignNex for Economics 
* [Metal Block](https://thenounproject.com/term/metal-bock/1518464/) By Creaticca Creative Agency for Metallurgy
* [Chemistry](https://thenounproject.com/term/chemistry/175847/) By Creative Stall

### Industrial
* [Science](https://thenounproject.com/term/science/1901524/) By Dinosoft Labs for Scientific Theory
* [Factory](https://thenounproject.com/term/factory/26212/) By Lil Squid for Industrialization
* [Rifle](https://thenounproject.com/term/rifle/371894/) By Alexander Skowalsky for Rifling
* [Grenade](https://thenounproject.com/term/grenade/1950318/) By Dama Adhikara for Military Science
* [Fertilizer](https://thenounproject.com/term/fertilizer/1215597/) By Jae Deasigner
* [Bacteria](https://thenounproject.com/term/bacteria/706038/) By Maxim Kulikov for Biology
* [Electricity](https://thenounproject.com/term/electricity/816936/) By Ben Davis
* [Turbines](https://thenounproject.com/term/turbine/86212/) By Leonardo Schneider for Steam Power
* [Dynamite](https://thenounproject.com/term/dynamite/610652/) By Simon Martin

### Modern
* [Gears](https://thenounproject.com/term/gears/1484672/) By Aiden Icons for Replacable Parts
* [Radio](https://thenounproject.com/term/radio/124575/) By Arthur Shlain
* [Piston](https://thenounproject.com/term/piston/1224/) By Proletkult Graphik for Combustion
* [Plastic](https://thenounproject.com/term/plastic/478826/) By Yu luck
* [Microphone](https://thenounproject.com/term/microphone/470266/) By Viktor Vorobyev for Mass Media
* [Flight](https://thenounproject.com/term/flight/1014306/) By Genius Icons
* [Train](https://thenounproject.com/term/train/651644/) By  Federico Panzano for Railroad
* [Refridgerator](https://thenounproject.com/search/?q=refridgerator&i=1188873) By b farias, CL

### Information
* [Pill](https://thenounproject.com/term/pill/780458/) By Alex Arseneau for Pharmaceuticals
* [Computer](https://thenounproject.com/term/computer/1967529/) By Shastry
* [Nuclear Reactor](https://thenounproject.com/term/nuclear-reactor/426463/) By Jeremie Sommet for Nuclear Fission 
* [Ecology](https://thenounproject.com/term/ecology/1970666/) By ProSymbols
* [Robotic Arm](https://thenounproject.com/term/robotic-arm/1970874/) By Karl Gilbert for Robotics
* [Rocket](https://thenounproject.com/term/rocket/1743642/) By kareemov for Rocketry

### Future
* [Nanoparticles](https://thenounproject.com/term/nanoparticles/822286/) By Gyan Lakhwani for Nanotechnology
* [Satellite](https://thenounproject.com/term/satellite/1466641/) By Ben Davis for Satellites
* [Electronics](https://thenounproject.com/search/?q=Electronics&i=1565843) By Cuby Design
* [Atom](https://thenounproject.com/term/atom/1586852/) By Kelsey Armstrong for Particle Physics
* [Information Technology](https://thenounproject.com/term/information-technology/1927668/) By Vectors Markeet for Future Tech

## Terrain

* [Hills](https://thenounproject.com/term/hills/540185/) By Juraj Sedlák
* [Mountains](https://thenounproject.com/term/mountains/2062034/) By icon 54
* [Forest](https://thenounproject.com/term/forest/1826995/) by Milinda Courey for Jungle
* [Forest](https://thenounproject.com/search/?q=forest&i=1744681) By Lance B
* [Palm Tree](https://thenounproject.com/search/?q=palm%20tree&i=366833) By Tatiana for Oasis
* [Water](https://thenounproject.com/term/water/1762848/) By Kozan for Marsh
* [Harvest](https://thenounproject.com/term/harvest/1022373/) By Made for Flood plains
* [Puddle](https://thenounproject.com/search/?q=puddle&i=1138155) By Bakunetsu Kaito for Lakes

## Others 

* [Circle](https://thenounproject.com/term/circle/1841891/) By Aybige 
* [Arrow](https://thenounproject.com/term/arrow/18123/) By Joe Mortell for movement
* [Connection](https://thenounproject.com/search/?q=connection&i=1521886) By Travis Avery
* [Skull](https://thenounproject.com/search/?q=Skull&i=1030702) By Vladimir Belochkin for disbanding units
* [Crosshair](https://thenounproject.com/search/?q=crosshairs&i=916030) By Bakunetsu Kaito for selecting enemies to attack
* [City](https://thenounproject.com/search/?q=city&i=571332) By Felix Westphal
* [Fire](https://thenounproject.com/search/?q=Fire&i=96564) By Lloyd Humphreys for 
* [Sleep](https://thenounproject.com/search/?q=sleep&i=1760085) By Saeful Muslim 
* [Banner](https://thenounproject.com/term/banner/866282/) By Emir Palavan for embarked units
* [Arrow](https://thenounproject.com/term/arrow/18123/) By uzeir syarief for moving between idle units
* [Replace](https://thenounproject.com/search/?q=replace&i=17858) By Mike Rowe, AU
* [Resistance](https://thenounproject.com/term/revolution/1315305/) By HeadsOfBirds
* [Viking Hat](https://thenounproject.com/search/?q=pillage&i=185405) By my name is mud

# Sound credits

Sounds are from FreeSound.org and are either Creative Commons or Public Domain

* [Soft two-fingered snap](https://freesound.org/people/EathanMarkson/sounds/388958/) By EathanMarkson as 'click' for most clicks
* [Pencil1](https://freesound.org/people/stijn/sounds/43673/) By stijn as 'paper' for opening and closing the tech picker
* [SawInOut01](https://freesound.org/people/kingof_thelab/sounds/340243/) By kingof_thelab for construction picking?
* [Chain Snare #1](https://freesound.org/people/lovesbody/sounds/322079/) By lovesbody as 'fortify'
* [Level up](https://freesound.org/people/Marregheriti/sounds/266100/) By Marregheriti as 'upgrade' for upgrading units
* [levelup](https://freesound.org/people/Seidhepriest/sounds/382915/) By Seidhepriest as 'chimes' for special actions (free tech, build city, hurry wonder etc.)
* [Coin](https://freesound.org/people/TheDJoe93/sounds/97373/) By TheDJoe93 as 'coin' for purchasing tiles and constructions
* [fast simple chop 1](https://freesound.org/people/dave.des/sounds/127196/) By dave.dev as 'whoosh' for moving units around
* [Military kick](https://freesound.org/people/Dodgy%20C/sounds/72070/) By Dodgy C as 'promote' for unit promotions
* [Tank reload](https://freesound.org/people/KieranKeegan/sounds/418882/) By KieranKeegan as 'setup' for siege unit setup
* [Scribble_short](https://freesound.org/people/waldram/sounds/257518/) By waldram as 'policy' for adopting policies
* [Hit Impact](https://freesound.org/people/Mrguff/sounds/369711/) by Mrguff as 'throw' for catapult & trebuchet attacks
* [Slingshot fly by 2](https://freesound.org/people/saturdaysoundguy/sounds/394186/) by saturdaysoundguy as 'arrow' for arrow attacks
* [Metal hit slide](https://freesound.org/people/orginaljun/sounds/149102/) by orginaljun as 'nonmetalhit' for pre-metal melee sounds
* [klick_anlauf](https://freesound.org/people/jascha/sounds/16576/) By jascha as 'metalhit' for metal melee sounds
* [Horse Neigh 2](https://freesound.org/people/GoodListener/sounds/322450/) By GoodListener as 'horse' for cavalry attack sounds
* [machine gun 001 - loop](https://freesound.org/people/pgi/sounds/212602/) By pgi as 'machinegun' for machine gun attack sound
* [uzzi_full_single](https://freesound.org/people/Deganoth/sounds/348685/) By Deganoth as 'shot' for bullet attacks