Units ignore the effects of City Walls when attacking
Robotics
60 Shields
12
2
2
Battleship
Units have a visiblility 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