Notes: The M-3 was a design evolved from the earlier M-2 light tank in the 1930s. They were used by the Allies; after World War 2, many of them were bought by Latin American and other countries, which still use them to this day. About 500 of these vehicles were built with diesel instead of gasoline engines. The M-3 is generally inadequate for modern antitank use, and most of them are used as infantry support vehicles.

The M-3A1 is an improved M-3. About 200 of them were built with a diesel engine. Differences include a new turret and removal of the driver's machineguns for more ammunition space for the main gun. Extra fuel tanks may be added to improve the range.

The M-3A3 is a further improved M-3. It has a new turret, and the hull is stretched to allow for more ammunition carriage, more internal fuel, and better suspension. These vehicles were not built with diesel engines.

The M-5 has twin gasoline automotive engines instead of the modified aircraft radial of the M-3. It also has improved frontal turret armor. The M-5A1 has an improved ammunition storage layout.

Notes: This is the same vehicle as the M-2 Bradley IFV, but used by scouts (CFV stands for Cavalry Fighting Vehicle). The main difference is that in the CFV, racks for extra ammunition and supplies take some of the space used by troop seats in the IFV version up. In addition, the firing ports are closed off, and the M-231 firing port weapons are not carried.

The M-3A2 is the same thing to the M-2A2 Bradley II IFV that the M-3 is to the M-2; i.e., a Cavalry Fighting Vehicle variant of the Bradley II IFV.

The M-3A2 with the Stingray System is a standard Bradley CFV fitted with an advanced optics jamming system. When in use, the operators of all vehicles and electro-optical systems (including thermal imaging and other night vision devices), image intensifiers, laser designators, laser rangefinders, and coincidence rangefinders must make a Formidable: Electronics roll in order to use their systems of that type. The Stingray system does not have any effect on purely optical sights such as binoculars and telescopic sights. This device is turret mounted and aimed in the same manner of a weapon, but operates on all electro-optical systems within a 90-degree arc of the facing of the turret. Jamming range is 5 km. These vehicles were first deployed, but not used, during the 1991 Persian Gulf War.

Notes: This is an M-1A2SEP Abrams tank extensively modified for use by battlefield commanders. In this role, the main gun, coaxial machinegun, and ammunition are removed to make room for extensive battle management electronics. A dummy cannon barrel and machinegun barrel are fitted in their place, and the only difference externally between the BCV and a genuine tank are the large amount of antennas the BCV sports. Inside, the turret and hull carry extensive vision gear, including 2^nd thermal Imaging and image intensification. The vehicle has a complete suite of three networked Pentium III-class computers built to tougher military specifications to take the vibrations of travel; these computers have a wireless LAN and battle management and land navigation software, including complete maps of the world. The system has a large LCD touch-screen for input, with a trackball and keyboard as backups. The BCV has a set of at least five radios, from tactical radios to long-range, and for communicating with aircraft and directly with computers on aircraft such as JSTARS. A laser designator is provided, along with software to produce firing solutions for any sort of fire support from mortars to heavy bombers. A secondary function of these vehicles is signal intelligence, with a crew position and computer for an intelligence officer who has a secondary role of intercepting and analyzing enemy broadcasts.

Twilight 2000 Notes: These vehicles, due to their rarity, were initially issued only to US Division and Brigade commanders or Armored and Mechanized Infantry Divisions, and rarely found their way to lower headquarters. They were never encountered in Reserve or National Guard divisions, with the notable exception of the 49^th Armored Division's commanding general's vehicle (TX ARNG). By 2000, the land navigation software is somewhat out of date, since the topographical and political maps are based on 1997 satellite photos.

Notes: An American-built, WWII-era, light AFV, now out of service in the US Army but still serving in many smaller armies. The M-24 is of conventional layout. The Chaffee was meant to replace the M-3/M-5 Stuart series of light tanks. The vehicle is not NBC-sealed. Taiwanese Chaffees have their 75mm guns replaces by French 90mm guns, their M-1919A4s replaced by MAG machineguns, and plug-ins for the crewmembers’ protective masks. Some of these vehicles have had their bow machineguns replaced by flamethrowers.

Notes: This is a US-built light tank of 1950s vintage. By 2000, the remaining Bulldogs were in Third-World use or reserve status. Most were heavily modified with external stowage, range finders, or lugs for reactive armor. The M-41 is the basic version, being a standard sort of light tank. The M-41A1 has rearranged ammunition storage. The M-41A2 has an improved engine. The M-41A3 adds one of the first night vision systems fitted to an armored vehicle.

The M-41B is a Brazilian modification of the Bulldog; it has had its main gun replaced with a 90mm Cockerill design and a new diesel engine. The M-41C is the same vehicle, but has an improved fire control system.

Notes: This light tank was originally designed for scouting duties and to provide light firepower for airborne divisions in the US. They had a long career with the US Army, replacing the earlier M-41 Walker Bulldog, but by the late 1980s they had been replaced in US service by the LAV-75 and M-8 Buford light tanks in airborne service, and heavier tanks and Bradley CFVs in other units. The 152mm gun is a large weapon for such a light vehicle, and the recoil is very violent. In addition, some of the bugs in the fire control system were never worked out. Whenever a conventional round (but not a Shillelagh missile) is fired from the main gun, roll 1D10; on a 1-2, minor damage is inflicted on the rangefinder.

Twilight 2000 Notes: The only users of the M-551 at the time of the Twilight War were the OPFOR units stationed at Fort Irwin in southern California and Fort Polk in Louisiana. These were largely restored to functional status at the time of the Mexican invasion, often still with the modifications used to make them look like enemy vehicles, and in this way were able to make many surprise attacks and accomplish infiltrations at night for reconnaissance.