In C3C there were only a handful of autoproduced units. Ancient Cavalry from the Statue of Zeus and Crusaders from Knights Templar are the only ones I recall.
There are bunches more in CCM, a whole lot more. Some of them require you to do something to make them work, like the zero cost upgrade of a Clan to a civ specific settler. Other do not, like Enslavers. They just appear and are ready to use.
The units actually produced are many and varied. Thus far, we have seen Clans, Apprentices, Enslavers, Training Chariots and Catapults. And many more are yet to come.
Except for the Clan and Aprrentice, which have the specific purpose of slowing down early expansion for everybody, the rest of the auto builds are not needed to win the game. They are fun, yes. I do like using a Flamethrower to serve up an attack of toasted Impis.

They add spice to the game, introduce some nifty units into the mix and make the game more interesting. But they are not needed to win.
But there are a lot of them, over 50 individual units which does not include the civ specific settlers and workers. And they all need their own building, which in turn means a lot of buildings. Most of these are small wonders, but a few city improvements and great wonders are also autoproduction centers.
The following lists, based on the civopedia, order the auto production data in several different ways.
Building Key:
Great Wonder
Small Wonder
Improvement
Autoproduced Units That Require A Manual Upgrade To Be Used, by Age
(
Unit Name, Upgrades To, A/D/M, Frequency/Turns, Building, Technology)
- Ancient Empires
- Apprentice, Civ specific worker, 1.1.2, 12, Worker Houses, None -> Explosives
- Clan, Civ specific settler, 0.0.1, 20, Palace, None.
- Trainings Chariot, Civ specific Chariot, 3.1.2, 8, Royal Stables, The Wheel -> Engineering.
- Age of Discovery
- Industrial Ages
- Apprentice, Partisan, 8.8.1, 12 Worker Houses, Explosives -> Mass Media.
- Trainingslauncher, Civ specific mobile rocket launcher, varies, 8, Arsenal, Rocketry.
- Hull, Civ specific aircraft carriers, varies, 8, Carrier Dock, WW2 Ships.
- Atomic Age
- Apprentice, Guerilla, 9.9.1, 12, Worker Houses, Mass Media.
- Apprentice, Vietcong, 10.10.1, 12, Worker Houses (Indo-China only), Mass Media.
Autoproduced Units (including automatic upgrades), by Age
(
Unit Name, A/D/M, Frequency/Turns, Building, Technology)
- Ancient Empires
- Answar Warrior, 4.2.3, 8, Jihad (Moslem only), Chivalry -> Enlightenment.
- Catapult, 4.1.2, 8, Siege Workshop, Mathematics -> Engineering.
- Crusader, 5.2.2, 8, Crusade (Christian only), Chivalry -> Enlightment.
- Egyptian Settler, 0.0.1, 20 turns, Sphinx (Egypt only).
- Egyptian Settler, 0.0.1, 30 turns, The Pyramids, Masonry.
- Horsearcher, 3.2.2, 3, Hunnic Storm (Mongols), Dark Ages -> Ballistics.
- Knight, 4.2.2, 5, Royal Tournament, Chivalry -> Ballistics.
- Medieval Infantry, 3.3.1, 6, Royal Garrison, Feudalism -> Renaissance.
- Praetorian, 3.3.1, 6, Roman Senate (Rome), Consturction -> Physics.
- Supply Shipment, 0.0.1, 15 turns, Great Iron Mine, Iron Working.
- Supply Shipment, 0.0.1, 15 turns, Silkroad, Trade.
- Supply Shipment, 0.0.1, 15 turns, Supplycenter (Dyes), Pottery.
- Supply Shipment, 0.0.1, 15 turns, Supplycenter (Furs), Writing.
- Supply Shipment, 0.0.1, 15 turns, Supplycenter (Gems), Seafaring.
- Supply Shipment, 0.0.1, 15 turns, Supplycenter (Incense), Polytheism.
- Supply Shipment, 0.0.1, 15 turns, Supplycenter (Ivory), Trade.
- Supply Shipment, 0.0.1, 15 turns, Supplycenter (Silks), Trade.
- Supply Shipment, 0.0.1, 15 turns, Supplycenter (Spices), Writing.
- Supply Shipment, 0.0.1, 15 turns, Supplycenter (Wines), Pottery.
- Age of Discovery
- Bishop, 16.3.2, 8, British Artillery School (Britian only), Imperialism.
- Bombarde, 8.1.2, 8, Great Guild, Gunpowder -> Imperialism.
- Cannon, 10.1.2, 8, Great Guild (all except Korea), Ballistics -> Imperialism.
- Coastal Battery, 5.2.1, 15, Coastal Fortress, Naval Guns -> Explosives.
- Famous Pirate, 3.3.4, 20, Jolly Roger, Naval Guns -> Screw Propeller.
- Guard Infantry, 7.7.1, 6, Arc De Triomphe (France), Aboslutism -> Chemical Industry.
- Heavy Artillery, 14.1.2, 8, Artillery School (all but Austria-Hungary, Britian and Germany), Imperialism.
- Heavy Artillery, ?, 8, German Artillery School (Austria-Hungary and Germany only), Imperialism.
- Hwach'a, 9.1.2, 8, Great Guild (Korea only), Ballistics -> Imperalism.
- Marine Infantry, 8.7.1 8, Marine Academy (all except Austria-Hungary and Germany), Naval Power.
- Nelson Class, 23.16.6, 16, Royal Navy (Britian only), Dreadnought -> Total war.
- Schnieder75, 11.1.2, 10, Military Academy, Military Traditon.
- Trebuchet, 5.1.2, 8, Siege Workshop, Engineering -> Gunpowder.
- Venetian Galleass, 2.2.4, 6, Doge Palace, Naval Guns -> Screw Propeller.
- Industrial Ages
- 150mm Howitzer, 18.1.2, 10, German Military Academy (Germany only), Fascism.
- 152mm Arty, 18.1.2, 10, Military Academy (all but Austria, Germany, Russia and USA), Mass Production.
- 155mm US Arty, 18.1.2, 10, Military Academy (USA only), Mass Production.
- 76mm Artillery, 10.3.2, 8, Ordance Factory, Mass Production.
- Alpine Troops, 10.10.1, 6, Alpine School, Combined Opeartions.
- Atomic Bomb, 0.3.1, 6, The Manhattan Project, Nuclear Bomb -> Space Flight.
- AT-Infantry, 4.11.1, 8, Tankdestroyer School, Rocketry -> The Laser.
- BR-2 Mortar, 18.1.1, 10, Military Academy (Russia only), Communism.
- Escorted Bomberraid, 0.5.26, 6, USAAF (USA only), Strategic Bombing -> Jetpropulsion.
- Flamethrower, 14.5.1, 8, Combat Engineers, Chemical Industry.
- German77, 11.1.2, 10, German Military Academy (Germany only), Military Tradition -> Fascism.
- German AT-Infantry, 5.12.1, 8, German Tankdestroyer School (Germany only), Rocketry -> The Laser.
- German Flamethrowers, 14.5.1, 8, German Combat Engineers (Austria-Hungary and Germany only), Chemical Industry.
- German MG-Battallion, 5.14.1, 8, German Machinegunners (Germany only), Great War Experience.
- Heavy Coastal Battery, 6.3.1, 15, Coastal Fortress, Steel.
- Hetzer, 12.11.3, 8, Ordance Factory (Austria-Hungary and Scandanavia only), Improved Tank Design.
- IS-3 Heavy Tank, 18.10.2, 7, Tankograd (Russia only), Blitzkreig Tactics -> Adv. Computers.
- Jagdpanther, 14.15.3, 8, Ordance Factory (Germany only), Improved Tank Design.
- KV-2 Heavy Tank, 14.8.2, 6, Kirov Factory (Russia only), Mass Production -> Improved Tankdesign.
- Luxury Liner, 0.5.7, 10, Blue Riband, Screw Propeller -> Plastics.
- M-10 Achilles, 10.9.3, 8, Ordance Factory (Britian, Cananda, France, India, Netherlands and Poland only), Improved Tank Design.
- M-36 Jackson, 12.9.3, 8, Ordance Factory (USA only), Improved Tank Design.
- M-7 Priest, 16.3.2, 8, Artillery School (Africian, American and European civs only), Mobile Warfare.
- Machinegunner errant entry.
- Marine, 12.7.2, 5, Marine Corps, Combined Operations.
- Marine Infanterie, 10.9.1, 5, Marine Academy (Austria-Hungary and Germany only), Great War Experience.
- MG Btln, 5.13.1, 8, Machinegunners (all except Britian, Germany and Japan), Great War Experience.
- MG Btln (Japanese), no stats given, 8, Japanese MG Academy (Japan only), Great War Experience.
- MG-Bat. (British), 14.1, 8, British Machinegunners (Britian only), Great War Experience.
- Mod. Destroyer errant entry (no entry for Royal Navy (Modern)).
- Motorized Infantry, 11.11.2, 8, Motorized Infantry (all but Germany), Mobile Warfare.
- Panzergrenadier, 11.11.2, 8, Panzergrenadiers (Germany only), Mobile Warfare.
- Paratrooper, 10.10.1, 6, Paratrooper School, Combined Operations.
- Russian MG, no stats given, 8, Machinegunners (Russia only), Great War Experience.
- Semovente 75, 10.8.3, 8, Ordance Factory (all but 11 civs), Improved Tank Design.
- Sexton 16.3.2, 8, Artillery School (Canada only), Mobile warfare.
- Su-100 13.14.3, 8 Ordance Factory (Russia only), Improved Tank Design.
- Su-76 16.2.2, 8, Artillery School (Arabia, Babylon, China, Indo-China, Korea, Mongols, Poland and Russia), Mobile Warfare.
- Tiger,18.10.2, 7, Tiger Factory (Germany only), Blitzkreig Tactics -> Electronics.
- U-Boat Type IX, 9.4.5, 5, Blom and Voss (Germany only), Submarines -> Nuclear Bomb.
- US Battleship, 16.14.6, 12, Pacific Fleet (USA only), Radio -> Nuclear Bomb.
- US Cavalry, 8.4.2, 6, US Cavalry (USA only), Military Tradition -> Combustion.
- Wespe, 16.3.2, 8, German Artillery School (Austria-Hungary and Germany only), Mobile Warfare.
- Atomic Age
- BTR-60, 13.15.2, 8, Motorized Infantry (11 Asiatic and African civs), The Cold War.
- Lockheed U-2, 0.2.150, 14, Skunk Works, Focused Research.
- M-113, 13.15.2, 8, Motorized Infantry (all except African and Asian civs), The Cold War.
- Modern Marine, 14.11.2, 5, Marine Corps, Synthetic Fibers.
- Nuclear Submarine, ?, 8, National SSBN Project, The Cold War.
- Peacekeeper, 15.13.2, 8, United Nations, Plastics.
- Self-propelled Artillery, 24.5.2, 8, Artillery School (all but Britian and Germany), Adv. Computers.
- Self-propelled Artillery, ?, ?, Artillery School (Britian only), Adv. Computers.
- Self-propelled Artillery, ?, ?, Artillery School (Germany only), Adv. Computers.
- SR-71 Blackbird, 10.7.150, 14 Skunk Works, Supersonic Flight.
- Tarawa Class, 5.9.7, 14, Blue Riband (Modern), Plastics.
- TOW Infantry, 12.14.1, 8, Ministry of Defence, The Laser.
- Transport, ?, ?, Blue Riband (Modern), Plastics.
Invisible, Enslaving Autoproduced Units, by Age
(
Unit Name, A/D/M, Frequency/Turns, Building, Technology)
- Ancient Empires
- Brahmin, 3.1.2, 8, Great Temple (Hindu only), Philosophy -> University.
- Enslaver, 2.1.2, 10, Slavers Hut, Warrior Code -> Enlightment.
- Missionary, 3.1.2, 8, Great Monastery (Christian only), Religion -> University.
- Mullah, 3.1.2, 8, Golden Mosque (Moslem only), Religion -> University.
- Priest, 3.1.2, 8, Temple of Blood (Mesoamerican only), Mysticism -> University.
- Prophets, 3.1.2, 8 Solomon's Temple (Israel), Polytheism -> Alchemy.
- Prophets, ?, ? Stonehenge, Polytheism -> Feudalism.
- Prophets, 3.1.2, 8 Temple of Baalbek, Polytheism -> Feudalism.
- Warrior Monk, 3.2.2, 8, Monastry of Martial Arts (Buddhist only), Chivalry -> Enlightment.
- Yogi, 3.1.2, 8, Great Pagoda (Buddhist only), Philosophy -> University.
- Age of Discovery
- Lawyer, 6.2.2, 10, Supreme Court, Jurisprudence.
- Industrial Ages
- Atomic Age
Autoproduction Building by Age
(Building, Unit, Frequency/Turns, Technology)
Italics = manual upgrade
Asterik (*) after building indicates upgrades from initial unit.
- Ancient Empires
- Royal Stables*, Training Chariot, 7, The Wheel.
- Crusade, Crusader, 8, Chivalry -> Enlightenment.
- Golden Mosque, Mullah, 8, Religion -> University.
- Great Iron Mine, Supply Shipment, 15, Iron Working.
- Great Monastery, Missionary, Religion -> University.
- Great Pagoda, Yogi, 8, Religion -> University.
- Great Temple, Brahmin, 8, Philosophy -> University.
- Hunnic Storm, Horsearcher, 3, Dark Ages -> Ballistics.
- Jihad, Ansar Warrior, 8, Chivalry -> Enlightenment.
- Monastery of Martial Arts, Warrior Monk, Chivalry -> Enlightenment.
- Palace*, Basic Settler, 20, none.
- Roman Senate, Praetorian, 6, Construction -> Physics.
- Royal Garrison, Medieval Infantry, 6, Feudalism -> Renaissance.
- Royal Tournametn, vKnight, 5, Chivalry -> Ballistics.
- Siege Workshop*, Catapult, 8, Mathematics -> Gunpowder.
- Silkroad, Supply Shipment, 15, Trade.
- Slaver's Hut, Enslaver, 10, Warrior Code -> Enlightenment.
- Solomon's Temple, Prophet, 8, Polytheism -> Alchemy.
- Sphinx, Egyptian Settler, 20, none.
- Stonehenge, Prophet, 8, Polytheism -> Alchemy.
- SupplyCenter (all), Supply Shipment, 15, Polytheism/Pottery/Seafaring/Writing.
- Temple of Baalbek, Prophet, 8, Polytheism -> Feudalism.
- Temple of Blood, Priest, 8, Mysticism -> University.
- Worker Houses*, Apprentice, 12, none.
- Age of Discovery
- Artillery School*, Heavy Artillery, 8, Imperalism.
- Arc De Triomphe, Guard Infantry, 6, Absolutism -> Chemical Industry.
- British Artillery School*, Heavy Artillery, 8, Imperialism.
- Coastal Fortress, Coastal Battery, 15, Naval Guns.
- Doge Palace, Venetian Galleass, 6, Naval Guns -> Screw Propeller.
- German Military Academy, German77, 10, Military Tradition.
- Great Guild, Bombarde, 8, Gunpowder -> Imperialism.
- Jolly Roger, Famous Pirate, 20, Naval Guns -> Screw Propeller.
- Marine Academy, Marine Infantry, 8, Naval Power.
- Military Academy*, Schnieder75, 10, Military Tradition.
- Supreme Court, Lawyer, 10, Jurisprudence.
- US Cavalry, US Cavlary, 6, Military Tradition -> Combustion.
- Industrial Ages
- Alpine School, Alpine Troops, 6, Combined Operations.
- Arsenal*, Trainingslaucher, 8, Rocketry.
- Blohm & Voss, Uboat-Type IX, 5, Submarines -> Nuclear Bomb.
- Blue Riband, Luxury Liner, 10, Screw Propeller -> Plastics.
- Carrier Dock*, Carrier Hull, 8, WW2 Ships.
- British Machinegunners, Mg-Bat (Britian), 8, Great War Experience.
- Combat Engineers, Flamethrower, 8, Chemical Industry.
- German Artillery School*, Heavy Artillery, 8, Imperialism.
- German Combat Engineers, German Flamethrower, 8, Chemical Industry.
- German Machinegunners, German MG-Battallion, 8, Great War Experience.
- German Tankdestroyer School, German AT-Infantry, 8, Rocketry.
- Heavy Coastal Battery, Heavy Coastal Battery, 15,Explosives.
- Japanese MG-Academy, MG Btln (Japan), 8, Great War Experience.
- Kirov Factory, KV-2 Heavy Tank, 6, Mass Production -> Improved Tank Design.
- Machinegunners, MG Btln, 8, Great War Experience.
- The Manhattan Project, Atomic Bomb, 6, Nuclear Bomb -> Space Flight.
- Marine Corps, Marine, 6, Combined Operations.
- Motorized Infantry, Motorized Infantry, 8, Mobile Warfare.
- Ordance Factory*, 76mm Arty, 8, Mass Production.
- Pacific Fleet, US Battleship, 12, Radio -> Nuclear Bomb.
- Panzergrenadiers, Panzergrenadiers, 8, Mobile Warfare.
- Paratrooper School, WWII Paratrooper, 6, Combined Operations.
- Royal Navy, Nelson Class, 15, Dreadnought -> Total War.
- Tankdestroyer School, AT-Infantry, 8, Rocketry.
- Tankograd, IS-3 Heavy Tank, 7, Blitzkrieg Tactics -> Adv. Computers.
- Tiger Factory, Tiger, 7, Blitzkrieg Tactics -> Electronics.
- USAAF, B-24 Liberator Escorted Bombing Raid, 6, Strategic Bombing -> Jetpropulsion.
- Atomic Age
- Blue Riband (Modern, Transport, 10, Plastics.
- Ministry of Defence, TOW Infantry, 8, The Laser.
- National SSBN Project, Nuclear Submarine, 8, The Cold War.
- Skunk Works, Lockheed U-2, 14, Focused Research.
- United Nations, Peacekeeper, 8, Plastics.
Prerequistes Buildings for Auto Producing Building, by Age
(Note: Except for
Crusade and
Jihad, these buildings must be in the city. Other requirements, like a coastal city or location of a resource, are not addressed in this list.)
- Ancient Empires
- Royal Stables: Palace.
- Crusade: two Basilicas.
- Golden Mosque: Islamic Community.
- Great Iron Mine: none
- Great Monastery: Christian Community.
- Great Pagoda: Buddhist Community.
- Great Temple: Hindu Community.
- Hunnic Storm: Mongol Symbol.
- Jihad: two Mosques.
- Monastry of Martial Arts: Wat
- Palace: none.
- Roman Senate: Roman Symbol.
- Royal Garrison: none.
- Royal Tournament: none.
- Siege Workshop: none.
- Silkroad: none.
- Slaver's Hut: none.
- Solomon's Temple: Hebrew Community.
- Sphinx: Egyptian Flag.
- Stonehenge: none.
- Supply Center (all): none.
- Temple of Ballbek: none.
- Temple of Blood: Mesoamerican Stonehead.
- Worker Houses: none.
- Age of Discovery
- Arc De Triomphe: French Flag.
- Artillery School: Military Academy
- Coastal Fortress: none.
- Doge Palace: none.
- British Artillery School: Military Academy
- German Military Academy: none.
- Golden Mosque: Islamic Community.
- Great Guild: none.
- Jolly Roger: none.
- Marine Academy: none.
- Military Academy: none
- Supreme Court: Courthouse.
- US Cavalry: American Flag.
- Industrial Ages
- Alpine School: none.
- Arsenal: none.
- Blohm & Voss: German Flag.
- Blue Riband: none.
- Carrier Dock: none.
- British Machinegunners: British Artillery School
- Combat Engineers: Military Academy.
- German Artillery School: German Military Academy.
- German Combat Engineers: German Military Academy.
- German Machinegunners: German Military Academy.
- German Tankdestroyer School:German Military Academy.
- Heavy Coastal Battery: Coastal Fortress.
- Japanese MG-Academy: Japanese Flag.
- Kirov Factory: Russian Flag.
- Machinegunners: Military Academy.
- The Manhattan Project: none.
- Marine Corps: none.
- Motorized Infantry: Military Academy.
- Ordance Factory: none.
- Pacific Fleet: American Flag.
- Panzergrenadiers: German Military Academy.
- Paratrooper School: none.
- Royal Navy: British Flag.
- Tankdestroyer School: Military Academy.
- Tankogard: Russian Flag.
- Tiger Factory: German Flag.
- USAAF: American Flag.
- Atomic Age
- Blue Riband (Modern): none.
- Ministry of Defence: none.
- National SSBN Project: none.
- Skunk Works: none.
- United Nations: none.
Since a Military Academy is needed for several other buildings, it is helpful to rename the city that has the Military Academy in some way so that you know where this small wonder is located. Otherwise, you might miss out on a unit because the required building can only be built in one city. And you forgot where you had placed your Military Academy!
