Cruiser Mk IV

Cruiser Mk IV
Tank, Cruiser, Mk IV (A13 Mk II)
Cruiser Mk IV.jpg
Type Cruiser tank
Place of origin  United Kingdom
Service history
In service 1940-1941[1]
Weight 14.76 Long tons
Length 6 m (240 in)
Width 2.6 m (100 in)
Height 2.5 m (98 in)
Crew 4 (commander, gunner, loader, driver)

Armour 6 - 30 mm
QF 2-pdr gun
87 rounds
0.303" Vickers machine gun
3,750 rounds
Engine Nuffield Liberty V12 gasoline
340 hp (250 kW; 340 PS)
Suspension Christie
90 mi (140 km)
Speed 30 mph (48 km/h) (off road 14 mph (23 km/h))

The Tank, Cruiser, Mk IV (A13 Mk II) was a British cruiser tank of World War II. It followed directly on from the Tank, Cruiser, Mk III (A13). The first Mk IVs were Mk IIIs with extra armour fitted to the turret. Later Mk IVAs were built with the complete extra armour.


Design and development

Britain became interested in fast tanks after observing the Soviet BT tanks during the 1936 Red Army manoeuvres. The BT was based on the revolutionary designs of American Walter J Christie, and so a team from Morris Motors was sent to the United States to purchase one of Christie's tanks, and also the rights to build more. The Tank purchased became known as the A13E1, and this was delivered in late 1936. However, the hull was too small and this led to a second British-built prototype being constructed.

The A13E2 was built to mount the turret of the Vickers A9, Cruiser Tank MkI. This carried a 40mm 2 Pounder anti-tank gun and co-axial .303 Vickers water-cooled machine gun. The drive train was also revised, with the road wheels no longer powered, and so the tank could not be driven on its wheels alone. Better tracks were used, with rear mounted drive sprockets; on trials over 40 mph was attained on these tracks, but later the speed was governed to 30 mph. The armour basis of the A13E2 was 15mm, in line with other pre-war fast tank designs.

The A13E3 was the final trials model; this led to the production tank, the A13 MkI, Cruiser Tank MkIII, which entered production in 1939 at Nuffield Mechanization & Aero Ltd, a munitions subsidiary of Morris Motors. An order for 65 tanks was placed; and at least 30 tanks completed when the War Office decided to build a new model with thicker armour. The A13 MkII, Cruiser Tank MkIV, had a maximum armour thickness of 30mm,and faceted armour was mounted on the original turret's sides and rear. This gave the tank a far more modern appearance. Some MkIII tanks were re-built to MkIV standard while at the factory.

In service, the .303 Vickers water-cooled machine gun gave constant trouble, and so the British army decided to replace it with the 7.92mm BESA. All British tanks were to have their designs modified to mount the new weapon from early 1940. This led to the main production version, the A13 MkIIA, Cruiser Tank MkIVA. A few examples of this model were sent with the BEF to France, along with most of the earlier A13's so far produced. It is not known how many A13 MkIVA tanks were produced; numbers vary between 225 and 665 depending on source. English Electric, Leyland, and LMS Railway were also involved in A13 production.

In France the A13 did not do well; this was mainly due to poor training as a result of its being rushed into service. Many tanks shipped to France were in poor condition, some so new they had vital parts not yet installed. However, the A13 did much better in the deserts of North Africa, and coped with the conditions better than some other designs. It was fast, and its 2 Pounder gun was a fine weapon against Italian and German tanks of this period. It stayed in contention as a battle tank until late 1941, when newer models of the PzKpfw III and IV appeared with thicker armour and larger guns. In North Africa it was the anti-tank gun which claimed the vast majority of British tanks lost in battle; German tanks accounted for few British losses, contrary to popular belief.

The A13 MkIII, Cruiser Tank MkV was a radical departure from the original A13 design and constituted a new tank. Both hull and turret were redesigned, and it used a new flat-12 Meadows engine with radiators mounted in the front hull. Named the Covenanter, it was built in large numbers, but was not battleworthy and was used only for training. The A13 MkIIA was replaced by the A15 Crusader, which was similar to the Covenanter but used the original A13 engine.

Production history

A Cruiser Mk IV tank destroyed in the North African Campaign.
  • 65 Mk III - Built 1939 by Nuffield (some converted to Mk IV)
  • 225-665 Mk IV and MkIVA - Built 1939-41 by Nuffield, Leyland,English Electric and LMS.
  • Mk IV CS - Not Built
  • MkV - Complete re-design by LMS Railway, A13, Cruiser Tank MkV Covenanter



.303 Vickers machine gun replaced with 7.92 mm BESA machine gun. MkIVA featured a new gun mantlet. Built at several factories including LMS Railway. Main type used in Desert 1940-42.


  • No Close Support Tanks were built, A9 CS was used in A13 Regiments

Combat History

The Cruiser Mk IV and MkIVA, in small numbers (40?) saw service in France in 1940 with the 1st Armoured Division of the BEF. Most were abandoned at Calais, and the few tanks that did see action were overwhelmed by the vastly superior German forces. From October 1940 the Cruiser Tank MkIVA was sent to North Africa, where it served alongside the older A9, Cruiser Tank MkI and A10 Cruiser Tank MkII. The A13 was never available in sufficient numbers and a typical Armoured Brigade would have a mix of slow (10-20 mph) A9 and A10 with faster (30-40 mph) A13 and Light Tank MkVI (acting as Cruiser Tanks); hardly an ideal sutuation, bringing a whole host of tactical not to say logistical problems . However, the A13 was popular with its crews and its only real drawback was the lack of a high explosive shell for the 2 Pounder. Like all British tanks of the period, it was vulnerable to anti-tank guns, which it had no way of countering except by short range machine gun fire. The A13 was generally reliable, and the 2 Pounder gun was adequate against all Axis tanks up to late 1941, when the A13 was retired. It was replaced by the A15 Crusader tank, which was in essence an enlarged A13 with thicker armour.


  1. ^ *Forty, George; Jack Livesy (2006). The World Encyclopedia of Tanks & Armoured Fighting Vehicles. Lorenz Books. pp. 55. ISBN 9780754817. 

External links

British armoured fighting vehicle production during World War II

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