Mark IV tank

Last updated

Mark IV
MarkIVTankWithUnditchingBeam1917.jpg
Mark IV male with unditching beam deployed
Type Heavy tank
Place of originUnited Kingdom
Service history
Used by British Army
Imperial German Army
Reichswehr
Imperial Japanese Army
Wars First World War
German Revolution of 1918–19
Production history
Designer
Manufacturersee text
Unit costabout £5,000 [1]
ProducedMay 1917 – end 1918
No. built1,220
Specifications
Mass28 tons (28.4 tonnes)
Female: 27 tons (27.4 tonnes)
Length26 ft 5 in (8.05 m)
WidthMale: 13 ft 6 in (4.12 m)
Crew8

Armour 0.5 inches (12 mm)
Main
armament
Male: Two 6-pounder (57-mm) 6 cwt QF guns with 332 rounds
Female: five .303 Lewis guns
Secondary
armament
Male: Three .303 in Lewis guns
Engine Daimler-Foster, 6-cylinder in-line sleeve valve 16 litre petrol engine
105 bhp at 1,000 rpm
TransmissionPrimary: 2 Forward, 1 Reverse
Secondary – 2 speed
Fuel capacity70 Imperial gallons
Operational
range
35 mi (56 km)
Maximum speed 4 mph (6.4 km/h)

The Mark IV (pronounced Mark four) was a British tank of the First World War. Introduced in 1917, it benefited from significant developments of the Mark I tank (the intervening designs being small batches used for training). The main improvements were in armour, the re-siting of the fuel tank and ease of transport. A total of 1,220 Mk IV were built: 420 "Males", 595 "Females" and 205 Tank Tenders (unarmed vehicles used to carry supplies), which made it the most numerous British tank of the war. The Mark IV was first used in mid 1917 at the Battle of Messines Ridge. It remained in British service until the end of the war, and a small number served briefly with other combatants afterwards.

Contents

Development

The director of the Tank Supply Department, Albert Gerald Stern, first intended to fit the Mark IV with a new engine and transmission. Production of battle tanks was halted until the new design was ready, necessitating the use of the Mark II and III as interim training tanks. Failing to complete development soon enough to start production in time to have 200 tanks ready for the promised date of 1 April 1917, Stern was ultimately forced to take a Mark IV into production in May 1917 that was only slightly different from the Mark I tank.

The inside of a Mark IV seen through a peephole on the starboard sponson. One machine gun is visible at the forefront above. Mark IV Lodestar III inside view 02.JPG
The inside of a Mark IV seen through a peephole on the starboard sponson. One machine gun is visible at the forefront above.

The Mark IV Male initially carried three Lewis machine guns – one in the cab front and one in each sponson [nb 1] – and a QF 6 pdr 6 cwt gun in each sponson, with its barrel shortened as it had been found that the longer original was apt to strike obstacles or dig into the ground. The sponsons were not mirror images of each other, as their configuration differed to allow for the 6 pdr's gun-layer operating his gun from the left and the loader serving the gun from the right. The guns had a 100 degree arc of fire but only the starboard gun could fire straight ahead. [2] The Female had five Lewis guns but no 6-pounders.

The decision to standardise on the Lewis gun was due to the space available within the tanks. Despite its vulnerable barrel and a tendency to overheat or foul after prolonged firing, the Lewis had the advantage that it used compact pan magazines which could hold up to 96 rounds. The Hotchkiss was fed from a rigid strip which was trimmed down to only 14 rounds for tank use; no sooner had the machine gunner guided the fall of shot onto the target than it was time to change the strip and the process repeated. [3] It was not until a flexible 50 round strip was fully developed in May 1917 that the Hotchkiss would become the standard machine gun for tanks again. The changes caused delays, such as adapting the design for the bulky Lewis cooling barrel, and later, problems when the Hotchkiss strips had to be stored in positions designed for Lewis gun magazines. [3]

At the 1917 Battle of Cambrai, Mark IV tanks were equipped with fascines, bundles of brushwood bound with chains, about 10 ft (3.0 m) long and 4 ft 6 in (1.37 m) in diameter carried on the roof of the cab. They were dropped into trenches to allow the tank to cross over more easily. [4]

A large number of these tanks were also used for development work. In an attempt to improve trench-crossing capability, the "tadpole tail", an extension to the rear track horns, was introduced. However, it proved insufficiently rigid and does not appear to have been used in combat. Other experimental versions tested radios, mortars placed between the rear horns, and recovery cranes. Some of these devices were later used on operational tanks. Mark IVs were also the first tanks fitted with "unditching beams" by field workshops. A large wooden beam, reinforced with sheet metal, was stored across the top of the tank on a set of parallel rails. If the tank became stuck, the beam was attached to the tracks (often under fire) and then the tracks would drag it beneath the vehicle, providing grip.

Production

The Mark IV was built by six manufacturers: Metropolitan (the majority builder), Fosters of Lincoln, Armstrong-Whitworth, Coventry Ordnance Works, William Beardmore & Company and Mirrlees, Watson & Co., with the main production being in 1917. The first order was placed for 1,000 tanks with Metropolitan in August 1916. It was then cancelled, reinstated and then modified between August and December 1916. The other manufacturers, contracted for no more than 100 tanks each, were largely immune to the conflict between Stern and the War Office. [5]

Service

The Mark IV was first used in large numbers on 7 June 1917, during the British assault on Messines Ridge. Crossing dry but heavily cratered terrain, many of the 60-plus Mark IVs lagged behind the infantry, but several made important contributions to the battle. By comparison, at the Third Battle of Ypres (also known as Passchendaele) from 31 July, where the preliminary 24-day long barrage had destroyed all drainage and heavy rain had soaked the field, the tanks found it heavy going and contributed little; those that sank into the swampy ground were immobilised and became easy targets for enemy artillery. [6]

Nearly 460 Mark IV tanks were used during the Battle of Cambrai in November 1917, showing that a large concentration of tanks could quickly overcome even the most sophisticated trench systems.

In the aftermath of the German spring offensive on the Western Front, the first tank-to-tank battle was between Mk IV tanks and German A7Vs in the Second Battle of Villers-Bretonneux in April 1918. [nb 2]

About 40 captured Mark IVs were employed by the Germans as Beutepanzerwagen (the German word Beute means "loot" or "booty") with a crew of 12. [7] These formed four tank companies from December 1917. [8] Some of these had their six pounders replaced by a German equivalent. [9]

The last Mark IV to see service, briefly, was Excellent, a Mark IV male retained by the naval gunnery school HMS Excellent on Whale Island in Portsmouth harbour. In 1940 it was restored to operational status and driven to the mainland, where its new career was allegedly brought to an early end after damaging a car. [10]

Surviving vehicles

Mark IV female on display in Ashford, Kent. The white-red-white stripes on the front are a British recognition marking that was also carried by British tanks early in WW II MarkIVFemaleTankAshfordKent.jpg
Mark IV female on display in Ashford, Kent. The white-red-white stripes on the front are a British recognition marking that was also carried by British tanks early in WW II
Mark IV in Brussels Mark IV 03.jpg
Mark IV in Brussels

See also

Notes

  1. A spare Lewis gun was carried on board
  2. part of the Battle of the Lys

Citations

  1. Glanfield, 2006, Appendix 3
  2. Fletcher (2013), p. 59
  3. 1 2 Glanfield, 2006, p. 169
  4. "Great Britain's Heavy Tanks". mailer.fsu.edu. Archived from the original on 27 March 2014. Retrieved 21 February 2009.
  5. Glanfield, 2006, Appendix 2
  6. Glanfield, 2006, pp. 198–200
  7. Koch, Fred (1994). Beutepanzer im Ersten Weltkrieg (in German). Podzun-Pallas-Verlag GmbH. ISBN   3790905208.
  8. AFV Profile No. 3 Tanks Marks I to V
  9. Fletcher, David (1994). Tanks and trenches: First hand accounts of tank warfare in the first world war. Alan Sutton publishing Ltd. p. 204. ISBN   0750903465.
  10. Fletcher 2007, p. 43
  11. Pullen, Richard (2007). The Landships of Lincoln (2nd ed.). Tucann. p. 136. ISBN   978-1-873257-79-1.
  12. Fletcher (2007)
  13. "Tank cambrai : Tank of flesquieres official website". Archived from the original on 29 March 2007. Retrieved 13 May 2007.
  14. "Guy Martin's WWI Tank – All 4".
  15. "JCB Team helps Guy Martin reproduce WW1 Tank as a tribute to the Centenary". 16 November 2017.

Related Research Articles

<span class="mw-page-title-main">Battle of Cambrai (1917)</span> 1917 World War I battle

The Battle of Cambrai was a British attack in the First World War, followed by the biggest German counter-attack against the British Expeditionary Force (BEF) since 1914. The town of Cambrai, in the département of Nord, in France, was an important supply centre for the German Siegfriedstellung and capture of the town and the nearby Bourlon Ridge would threaten the rear of the German line to the north. Major General Henry Tudor, Commander, Royal Artillery (CRA), of the 9th (Scottish) Division, advocated the use of new artillery-infantry tactics on his sector of the front. During preparations, J. F. C. Fuller, a staff officer with the Tank Corps, looked for places to use tanks for raids. General Julian Byng, commander of the Third Army, decided to combine both plans. The French and British armies had used tanks en masse earlier in 1917, although to considerably less effect.

<span class="mw-page-title-main">Matilda II</span> British Army tank of World War II

The Infantry Tank Mark II, better known as the Matilda, is a British infantry tank of the Second World War.

<span class="mw-page-title-main">Churchill tank</span> British heavy infantry tank

The Tank, Infantry, Mk IV (A22) Churchill was a British infantry tank used in the Second World War, best known for its heavy armour, large longitudinal chassis with all-around tracks with multiple bogies, its ability to climb steep slopes, and its use as the basis of many specialist vehicles. It was one of the heaviest Allied tanks of the war.

<span class="mw-page-title-main">A7V</span> German World War I heavy tank

The Sturmpanzerwagen A7V was a heavy tank introduced by Germany in 1918 during World War I. One hundred chassis were ordered in early 1917, ten to be finished as fighting vehicles with armoured bodies, and the remainder as Überlandwagen cargo carriers. The number to be armoured was later increased to 20. They were used in action from March to October 1918, and were the only tanks produced by Germany in World War I to be used in combat, as well as being the first operational German Tank. It was developed as a response to British tanks. Although the A7V is generally considered to be better designed compared to its counterparts, it struggled to procure high production numbers due to its relative complexity and high cost.

<span class="mw-page-title-main">QF 18-pounder gun</span> WW1 British field gun

The Ordnance QF 18-pounder, or simply 18-pounder gun, was the standard British Empire field gun of the First World War-era. It formed the backbone of the Royal Field Artillery during the war, and was produced in large numbers. It was used by British Forces in all the main theatres, and by British troops in Russia in 1919. Its calibre (84 mm) and shell weight were greater than those of the equivalent field guns in French (75 mm) and German (77 mm) service. It was generally horse drawn until mechanisation in the 1930s.

<span class="mw-page-title-main">British heavy tanks of the First World War</span> Type of combat tank

British heavy tanks were a series of related armoured fighting vehicles developed by the UK during the First World War. The Mark I was the world's first tank, a tracked, armed, and armoured vehicle, to enter combat. The name "tank" was initially a code name to maintain secrecy and disguise its true purpose. The tank was developed in 1915 to break the stalemate of trench warfare. It could survive the machine gun and small-arms fire in "no man's land", travel over difficult terrain, crush barbed wire, and cross trenches to assault fortified enemy positions with powerful armament. Tanks also carried supplies and troops.

<span class="mw-page-title-main">Cruiser Mk IV</span> British WWII cruiser tank

The Cruiser Tank Mk IV was a British cruiser tank of the Second World War. It followed directly on from the Tank, Cruiser, Mk III. The first Mk IVs were Mk IIIs with extra armour fitted to the turret. Later Mk IVAs were built with the complete extra armour. The tank was used in France in 1940 and in the early part of the war in North Africa, before being withdrawn from service. A fast vehicle compared to other British tanks of the early part of the war, it was probably the best tank Britain had in 1940. In total, 955 of these tanks were built.

<span class="mw-page-title-main">Ordnance QF 2-pounder</span> Tank gun and anti-tank gun

The Ordnance QF 2-pounder, or simply "2 pounder gun", was a 40 mm (1.575 in) British anti-tank gun and vehicle-mounted gun employed in the Second World War.

<span class="mw-page-title-main">Ram tank</span> Canadian medium tank

The Tank, Cruiser, Ram was a cruiser tank designed and built by Canada in the Second World War, based on the U.S. M3 Medium tank chassis. Due to standardization on the American Sherman tank for frontline units, it was used exclusively for training purposes and was never used in combat as a gun tank. The chassis was used for several other combat roles however, such as a flamethrower tank, observation post and armoured personnel carrier.

<span class="mw-page-title-main">Gun Carrier Mark I</span> British self-propelled artillery

The Gun Carrier Mark I was a British vehicle of the First World War. The gun carrier was designed to transport a 6-inch howitzer or a 60-pounder gun forward soon after an attack to support infantry in advanced positions. Gun carriers were first used in the Battle of Pilckem Ridge during the Third Battle of Ypres. The carriers moved guns and equipment but were used for the rest of the war mainly for carrying equipment and supplies through areas under fire, where porters in the open would have suffered many casualties. The 6-inch howitzer could be fired while mounted, making the Gun Carrier Mark I the first modern self-propelled gun, a weapon capable of independent action and having tactical mobility on the battlefield.

<span class="mw-page-title-main">Female tank</span> Category of tanks during World War I

The "Female" tank was a variation of the British heavy tank deployed during the First World War. It carried multiple machine guns instead of the mix of machine guns and cannons mounted on the "male" tank. Lieutenant-Colonel Ernest Swinton, who played a part in the development of the first British tank and who was co-creator of the term "tank", is credited with inventing these gender-related terms, thinking that the best tank tactics would have the two types operating in concert.

<span class="mw-page-title-main">Tanks in World War I</span> Aspect of military history

The development of tanks in World War I was a response to the stalemate that developed on the Western Front. Although vehicles that incorporated the basic principles of the tank had been projected in the decade or so before the War, it was the alarmingly heavy casualties of the start of its trench warfare that stimulated development. Research took place in both Great Britain and France, with Germany only belatedly following the Allies' lead.

<span class="mw-page-title-main">Mark V tank</span> British WWI tank

The British Mark V tank was an upgraded version of the Mark IV tank.

<span class="mw-page-title-main">QF 6-pounder Hotchkiss</span> Family of light 57mm naval guns

The Ordnance QF Hotchkiss 6 pounder gun Mk I and Mk II or QF 6 pounder 8 cwt were a family of long-lived light 57 mm naval guns introduced in 1885 to defend against new, small and fast vessels such as torpedo boats and later submarines. There were many variants produced, often under license which ranged in length from 40 to 58 calibers, but 40 caliber was the most common version.

<span class="mw-page-title-main">QF 6-pounder 6 cwt Hotchkiss</span> Tank gun, armoured train gun

The Ordnance QF 6-pounder 6 cwt Hotchkiss Mk I and Mk II was a shortened version of the original QF 6 pounder Hotchkiss naval gun, and was developed specifically for use in the sponsons of the later marks of British tanks in World War I, from Mark IV onwards.

<span class="mw-page-title-main">QF 6-pounder Nordenfelt</span> Naval gun

The QF 6 pounder Nordenfelt was a light 57 mm naval gun and coast defence gun of the late 19th century used by many countries.

<span class="mw-page-title-main">British Army uniform and equipment in World War I</span>

The British Army used a variety of standardized battle uniforms and weapons during World War I. According to the British official historian Brigadier James E. Edmonds writing in 1925, "The British Army of 1914 was the best trained best equipped and best organized British Army ever sent to war". The value of drab clothing was quickly recognised by the British Army, who introduced Khaki drill for Indian and colonial warfare from the mid-19th century on. As part of a series of reforms following the Second Boer War, a darker khaki serge was adopted in 1902, for service dress in Britain itself. The British military authorities showed more foresight than their French counterparts, who retained highly visible blue coats and red trousers for active service until the final units received a new uniform over a year into World War I. The soldier was issued with the 1908 Pattern Webbing for carrying personal equipment, and he was armed with the Short Magazine Lee–Enfield rifle.

<span class="mw-page-title-main">Tanks in the British Army</span>

This article on military tanks deals with the history and development of tanks of the British Army from their first use in the First World War, the interwar period, during the Second World War, the Cold War and modern era.

The Norfolk Tank Museum is a collection of armoured fighting vehicles in Norfolk, East England. It is located just outside the village of Forncett St. Peter and 10 miles (16 km) south of the City of Norwich. The collection is made up of mostly British vehicles from the Cold War. The Museum contains around 30 military vehicles as well as a large collection of small arms. It includes the prototype Centurion AVRE 165, the only remaining Crossley-Kégresse 20-30 cwt half-track and a replica British First World War Mark IV that was built for The TV show Guy Martin's WWI Tank.

<span class="mw-page-title-main">Lone gunner of Flesquières</span> Possibly-mythical German soldier (1917)

The lone gunner of Flesquières is a possibly mythical German officer who is credited with destroying up to 16 British tanks at Flesquières, France, during the first day of the Battle of Cambrai on 20 November 1917. British tanks were generally successful in their attacks on 20 November, except at Flesquières, where many were disabled by German artillery. British Commander-in Chief Field Marshal Sir Douglas Haig visited the battlefield two days later and was given an account by a British officer that stated that many of the tanks were destroyed by a single German artillery officer who had remained with his gun when his men fled and was killed at his post. Haig included the account in his March 1918 dispatch on the battle. It provided a convenient excuse for the failure to progress at Flesquières and a reminder to his men of the importance of close cooperation between infantry and the tanks.

References