Equipped with an anti-air machine-gun which fires quickly and does heavy damage to air and infantry units.
Offensive: The anti-air machine-gun will quickly kill air units and clear away infantry. Spearhead with tanks to take the enemy fire whilst this sits behind and kills any rocket squads or aircraft which get close to your tanks.
Defensive: Does very little damage on tanks so counter with them. Can be out-ranged by high damage and health air units but this isn't cost effective.