Notes: A British-built MBT, rendered obsolete by the Chieftain but still widely used. The vehicle is slow but sturdy. Many of these tanks have been modified by their recipient countries with the addition of laser and computerized range finders, reactive armor lugs, replacement of the 105mm L7 gun with the 105mm NATO gun, and Israel has even modified some Centurions into APCs! Layout is standard, and there is a weapon mount (NMT) by the commander’s hatch.

Notes: This World War 2 British tank was a classified as a medium tank. By the 2003, it was being used only by Burma. It is old, and none of these vehicles has a wear value of better than 5. The only modification made to these vehicles is the replacement of the machineguns with more modern ones.

Notes: This first version of the British Challenger tank was developed in 1978 from the Shir 2 tank designed for what was then the Shah’s Iranian Army. The Challenger 1’s were built until 1989, when they were replaced by the Challenger 2. The vehicle is basically similar to the later Challenger 2 externally; telling features include the odd shaped turret (higher on the commander’s side than the loader’s side), the lack of a CITD (Commander’s Independent Thermal Device) on the roof of the turret, and the width of the tracks. Internally, the Challenger 1 has somewhat thinner armor, fire control and night vision less comprehensive, more internal room for ammunition, shorter-lasting batteries, shorter lasting NBC filters, and other such small things. The gun on the Challenger 1 is a 120mm L11A5 rifled gun, instead of the longer-barreled L30 found on the Challenger 2. Layout is conventional, with a driver’s hatch on the center of the front deck and commander and loader’s hatches on the turret deck. The Challenger 1 is used only by the British Army.

Twilight 2000 Notes: Iranian forces loyal to NATO did receive some Challenger 1’s, but only about 30 or so. A few were also supplied to Israel, and some 40 or so were sold to the Chinese. However, the bulk of the Challenger 1’s went to replace Challenger II losses in Europe or to fight insurgents in the British Isles themselves.

Merc 2000 Notes: This tank became quite a seller to those who could afford them.

Notes: This replaced the Challenger 1 in production in 1989, and is now the current standard tank of the British Army. They are also used by Oman, who had 36 at the start of the Twilight War. Externally they are similar to the Challenger 1, but internally, they are far different, with a different gun, better fire control, improved night vision with independent thermal imager channels for the commander and gunner, computers for battle management, fire control, navigation, and communications, and improvements to engine cooling, batteries, the NBC pack, and little things like air conditioning. The armor is improved and lugs for reactive armor were fitted to the TF, TS, HF, and (sometimes) HS. These vehicles are basically of the same standard as tanks like the M-1A2, Leopard 2A5, or Merkava 3.

The Challenger 2E is fitted with German MTU EuroPowerPack. This is smaller than the power pack mounted in standard Challenger 2s, allowing more fuel to be carried. The Challenger 2E is steered with a steering wheel instead of tillers. The Challenger 2E normally mounts an M-2HB (L) instead of a MAG.

Notes: This is the previous generation tank to the Challenger series, despite the nomenclature. First designed in 1958, in the late 1970s, the Chieftain was selected as the testbed for a new armor concept called Chobham (composite armor, the Stillbrew package); after the concept was proven sound, the armor was incorporated into all Chieftains and virtually all tank designs after that. Other components of the Chieftain were also steadily improved, and today’s Chieftains have fairly advanced fire control systems, improved night vision and gun stabilization, automatic transmission, integrated NBC systems, and other systems that were once advanced tank design, but are now standard. Most of the Chieftains had long been out of regular British service by the time of the Twilight War, but were still used in large numbers Iran, Iraq, Jordan, Kuwait, and Oman. Most British Chieftains still in service have been modified as ARVs, AEVs, and AVLBs. It is of conventional layout, with a driver’s hatch in the center front deck, and commander and loader’s hatches on the turret deck.

Notes: This tank, regarded as the best of the M-4 Sherman line, is a British modification of the M-4A4 Sherman. Modifications include a change of turret to accept a 17-pounder (76.2mm) high-velocity gun. A by-product of this modified turret is the increased armor and sloping of the turret. The vehicle is still in service with some Latin American countries, such as Argentina, which still operates a large number of them.

Vickers Mk1/Mk3/Mk3(E)

Notes: Some time after the Chieftain was built, it was offered for sale on the international market. The British soon discovered that though customers liked the protection offered by the Chieftain’s Chobham armor, they did not want to buy such a heavy, complicated, and most of all, expensive tank. In response, Vickers designed the Mk1, this design was more popular and sales were made to India, Kenya, Kuwait, Nigeria, and Tanzania. They were later license-produced in India; most Indian Mk1s were upgraded to the Vijayanta standard or Mk3 or 3(M) standard. The Mk1 was later developed into the Mk3, with better internal ammunition stowage, better fire control, and better night vision and communications suites. The engine is also more powerful and is a straight diesel engine instead of a more complicated multifuel engine.

The Vickers Mk3(M) is a British built tracked main battle tank, an up-gunned and up-engined variant of the standard Vickers Mk3 tank. There is a driver's hatch on the center front deck and commander's hatch and loader's hatch on the turret deck. The gunner uses the commander's hatch. A weapons mount (C) is located by the commander's hatch. Purpose-built for sale to Malaysia, kits were also made that allowed the modification of the standard Mk3 to this standard. The Vickers Mk3 base is modified with added armor as well as lugs for reactive armor on the HF, TF, and TS, the fire control is upgraded, as is night vision. For a touch of added crew comfort, air conditioning is added, a nod to the climate of Malaysia.