Overwatch
All units and weapons except for artillery pieces may opt for overwatch at the beginning of a turn in order to support friendly troops. Overwatch is possible within the arc of fire of the weapon or unit. Units will perform this duty until the player orders otherwise at the beginning of a turn of his liking. The unit is marked with an „overwatch“ token.
Suppose an enemy unit decides to shoot at one of your units. In that case, the covering unit will shoot at the enemy unit first and try to break up the enemy attack or even kill the enemy shooter before he can harm a friendly unit. To excercise overwatch perform the attack roll first (4D6), when successful check for effect on (2D6) and morale (2D6) of the enemy unit. Everytime overwatch is successful, the enemy attack is broken up.
Anti air guns may also shoot at enemy planes in their arc of fire that attack friendly units.
The unit on overwatch only use its maximum number of attacks per round. Machine guns shooting twice will have to check for overheating. Overwatch takes place during the enemy turn. To keep track hit every unit that has actively performed its overwatch duty and spent his maximum number of shots for the turn with a spent marker.
Going into overwatch itself does not spend an action. But an action is spent per shot at attacking enemy units. These actions will be subtracted from the action counter in the next turn of the player that is excercising overwatch.