The Land Raider Proteus would be used throughout the Great Crusade even after complaints emerged concerning the vehicle's carrying capacity, lack of a forward assault ramp, and inability to carry Terminators would lead to the development of the Spartan Assault Tank, and eventually the Land Raider Phobos. Both of these vehicles would go on to replace the Land Raider Proteus almost entirely within Imperial armouries. The Land Raider Phobos design was smaller than the massive Spartan Assault Tank, yet was still able to carry Terminators and also incorporated a forward assault ramp. The Land Raider Phobos maintained most of the advanced technologies used by the Land Raider Proteus. It is likely that the Proteus was the most common mark of Land Raider used by the Imperial Army, the combined mai