The ultimate British self-propelled anti-air vehicle. Even more heavily armed than the Light Tank Mk V and almost as mobile. Protection is similar though and the driver is in the open.
As the British got hold of more and more M4 Sherman tanks the Crusader tank was no longer the main tank. Crusader AA tanks were used in the battle of Normandy. The first Crusader AA tank had a single 40 mm Bofors M1936. Though in FHSW Crusader AA tanks are in use even earlier, such as in the battle of El Alamein.