Units ignore the effects of City Walls when attacking
Robotics
60 Shields
12
2
2
Battleship
Units have a visibility range of two sea squares. Units may bombard units in coastal land squares
Steel
160 Shields
18
12
4
Bomber
Units ignore the effects of City Walls when attacking and must return to a city or Carrier by the end of their second turn in the air. Units have a visibility range of 2 map squares. An attack by a Bomber ends its turn
Advanced Flight
120 Shields
12
1
8
Cannon
Made obsolete by the availability of Artillery
Metallurgy
40 Shields
8
1
1
Caravan
Units may ignore adjacent enemy untis during movement
Trade
50 Shields
0
1
1
Carrier
Units have a visibility range of 2 squares. Carriers may carry up to 8 air and Nuclear units
Advanced Flight
160 Shields
1
12
5
Catapult
Made obsolete by the availability of Cannon
Mathematics
40 Shields
6
1
1
Cavalry
Made obsolete by the availability of Riflemen
Horseback Riding
20 Shields
2
1
2
Chariot
Made obsolete by the availability of Knights
The Wheel
40 Shields
4
1
2
Cruiser
Units have a visibility range of 2 sea squares. Cruisers may bombard units in coastal squares
Combustion
80 Shields
6
6
6
Diplomat
Units may ignore adjacent enemy units during movement
Writing
30 Shields
0
0
2
Fighter
Units must return to a city or Carrier at the end of every turn. Fighters are the only unit which may attack other air units
Flight
60 Shields
4
2
10
Frigate
Units may carry up to 4 other units and are made obsolete by the availability of Transports
Magnetism
40 Shields
2
2
3
Ironclad
Made obsolete by the availability of Cruisers
Steam Engine
60 Shields
4
4
4
Knights
Made obsolete by the availability of Armor
Chivalry
40 Shields
4
2
2
Legion
Made obsolete by the availability of Riflemen
Iron Working
20 Shields
3
1
1
Mech. Inf.
Units may attack up to 3 times in one turn
Labor Union
50 Shields
6
6
3
Militia
Made obsolete by the availability of Musketeers
10 Shields
1
1
1
Musketeers
Made obsolete by the availability of Riflemen
Gunpowder
30 Shields
2
3
1
Nuclear
Units must be placed in a city or on a Carrier at the end of every turn (unless they are used to attack). Nuclear weapons may ignore zones of control and are invisible to enemy players
Rocketry and Nuclear Fission
160 Shields
99
0
16
Phalanx
Made obsolete by the availability of Musketeers
Bronze Working
20 Shields
1
2
1
Riflemen
Units do not become obsolete
Conscription
30 Shields
3
5
1
Sail
Units may carry up to 3 other units and are made obsolete by Frigates
Navigation
40 Shields
1
1
3
Settlers
Units are the only units which can build roads, railroads, irrigation, mines, and fortresses. Settlers can also found cities and clean pollution
40 Shields
0
1
1
Submarine
Units have a visibility range of 2 sea squares
Mass Production
50 Shields
8
2
3
Transport
Units may carry up to 8 other units
Industrialization
50 Shields
0
3
4
Trireme
Units may be lost at sea if not adjacent to land at the end of a turn. Triremes may carry up to 2 other units and are made obsolete by Sail