In contrast, the Centaur was chiefly used for training; only those in specialist roles saw action. The Centaur IV Close Support version with a 95 mm howitzer saw service in small numbers as part of the Royal Marine Armoured Support Group on D-Day. Originally intended to be used from landing craft and serve as static pillboxes, these examples retained the engine allowing the Marines to advance the tank inland. A number of Centaurs were also re-purposed as combat engineering vehicles, such as an armoured bulldozer.