3-75. Countermobility operations are those combined arms activities that use or enhance the effects of natural and man-made obstacles to deny enemy freedom of movement and maneuver (ATP 3-90.8). The primary purposes of countermobility are to shape enemy movement and maneuver and to prevent enemy forces from gaining a position of advantage. Countermobility supports the conduct of the offense, defense, and stability or defense support of civil authorities across the range of military operations.