 Pegasus Bridge features ten different types of terrain , which affect the movement of the troops and the defensibility of certain areas . If units are situated in towns or woodland areas , their attacks will be less effective . High wind speeds will also render British parachuting troops temporarily ineffective . Units on the map are presented as small squares and can be stacked together to increase defence . While British forces may destroy various bridges throughout the game , certain bridges such as those over the Caen Canal and Orne river must be preserved in order to win the game . 
