M274 Mongoose

The Marines' fastest ground vehicle is the Mongoose All-Terrain Vehicle. Essentially four wheels and an engine, this ATV can travel very fast over nearly all types of terrain. There is also a passenger seat on the rear, behind the driver. With no weapons on board, the passanger must use his own weapons for defense. It serves a similar purpose of the Covenant Ghost.

This vehicle did not make it into the final version of Halo 2 because the prototype version did not behave as well as Bungie wanted, but it will appear in Halo 3 as a vehicle for both singleplayer campaign and mulitplayer.