M831 Troop Transport Warthog
The M831 Troop Transport is a ground vehicle based on the chassis of the M12 "Warthog" Force Application Vehicle. Like the rest of the Warthog series, the M831 is designed and manufactured by AMG Transport Dynamics.
The M831 Troop Transport contains no armaments of its own. Instead, it features an extended tray covered in a protective rollcage which provides room for several personnel in the rear section along with one driver and a passenger in the front seats. Unlike other M12 FAV variants, it has an SLED spot light on top of the roll cage. A high-powered spotlight is also fitted to the Warthog.
Unlike other Warthog variants, the M831 lacks any standard armament, (such as the M41 Light Anti-Aircraft Gun used by the M12 Light Reconnaissance Vehicle). As such, a driver must rely on of his passengers' armament for offensive and defensive firepower. The usage of a troop compartment instead of a turret affords a 360 degree overlapping field of fire: this can be used to deadly effect when passengers carry an even distribution of anti-personnel and anti-vehicle weapons. Unfortunately, passengers riding behind the cab are highly exposed to enemy fire, much like the gunners on more typical Warthog variants.
On July 24, 2552, SPARTAN-B312 was transported to a UNSC camp to join NOBLE Team by an M831 TT. Two days later, when the Covenant attacked ONI SWORD Base during the opening actions of the Fall of Reach, UNSC Army troopers from 3 Echo utilized an M831 TT to return to their base, but were killed by Wraiths before reaching SWORD Base's gates.
On October 20 in the same year, Marines fighting in New Mombasa made use of numerous M381 TTs on the city's waterfront highway. While their operators were killed, the M381 TTs remained intact until the city was glassed the next morning by a Covenant fleet.
As the Battle of Earth drew to an end, the UNSC base codenamed Crow's Nest was attacked by the Covenant. Spartan John-117, after detonating a bomb in the base, drove a transport Warthog with a group of surviving Marines out of the destroyed base and managed to get back into contact with Lieutenant Commander Miranda Keyes. Another M381 TT was dropped by a D77H-TCI Pelican for John-117 and a squad of Marines to fight past the Covenant defense and clear a path to Voi. Another was utilized on the Ark, allowing John-117 and a group of Marines to rapidly deploy from one of the shielding towers around the Ark's core to the beach for airlift.
The M831 Troop Transport vehicle was originally slated to be in Halo 2 along with two other Warthog variants, the "Snow Warthog" and the "Jungle Warthog". Time constraints prevented Bungie from adding it to the game; the only new variant that made it into Halo 2 was the "Gauss" Warthog.
The M831 Troop Transport is not typically usable in Halo: Reach. It first appears in the cutscene Noble Actual, then later in the level, ONI: Sword Base, making a scripted drive before being destroyed. Occasionally, however, the vehicle will survive, or the script will not work properly, resulting in an undamaged, fully functioning Warthog spawning nearby.
List of appearances