Battle in the game is determined with dice. Artillery, Cavalry and Infantry, and Grenadier don't need a tech card. And in this game, bombard is deadly! There are many units. Most need Tech Cards (5 points a peice). Here are all the units.
Infantry (basic) (1 move, 2 cost)
Cavalry (Infantry with 2 moves) (2 move, 4 cost)
Tank (1+ Attack) (2 move, 5 cost)
Machine Gun (1+ Defense) (1 move, 3 cost)
Bazooka (1+ Attack vs Tanks) (1 move, 3 cost)
Fighter (2+ vs Bombers) (4 move, 4 cost)
Bomber (Can eliminate stacks of units within a city) (5 move, 5 cost)
U-Boat (1+ vs Battleship) (4 move, 3 cost)
Destroyer (1+ vs U-Boat) (4 move, 3 cost)
Battleship (1+ vs Destroyer, Shore Bombard, can't kill marines) (4 move, 4 cost)
Transport (Can transport 2 units across water. No attack or defense) (3 move, 3 cost)
Marine (Amphibious, can be killed by Destroyers) (1 move, 3 cost)
Artillery (Bombard, 1- Defense) (2 move, 3 cost)
B17 (American UU) (Extra movement than Bomber) (7 move, 6 cost)
Spitfire (British UU) (Extra movement than Fighter) (6 move, cost 3)
Panther (German UU) (1+ Attack) (2 move, 5 cost)
Zero (Japanese UU) (Kamakazie vs ships. Low cost) (4 move, 3 cost)
Frogman (Italian UU) (Marine with 2 moves) (2 move, 3 cost)
Grenider (French UU) (Only unit that can go through forest) (move 1, cost 2)
T34 (Russian UU) (Tank with 3 moves) (3 move, 5 cost)