M8 Greyhound

The was a six-wheeled armored car fielded by the Allied Powers in World War II. It was set to appear in Call of Duty: World at War but was cut for reasons unknown.

Call of Duty: World at War
Texture sheeets and a core model file remain. Despite the 37 mm gun and the turret being modelled, no weapon data file exists for it.

The name of the complete model is  suggesting the M8 was in use with the Americans, although whether on the Pacific or Western theatre is unknown. Interestingly, the MP suffix seems to imply that the vehicle was going to be used in multiplayer.