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Fourth Army (United Kingdom)

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Fourth Army
4th Army formation badge.
ActiveFirst World War (1916–1918)
Second World War (1943–1944, as deception only)
Country United Kingdom
Branch British Army
TypeArmy
EngagementsFirst World War
Commanders
Notable
commanders		Sir Henry Rawlinson

The Fourth Army was a field army that formed part of the British Expeditionary Force during the First World War. The Fourth Army was formed on 5 February 1916 under the command of General Sir Henry Rawlinson to carry out the main British contribution to the Battle of the Somme.

First World War

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General Sir Henry Rawlinson

History

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The Fourth Army was formed in France on 5 February 1916, under the command of Sir Henry Rawlinson.[1] It was created in preparation for the Battle of the Somme after the French Tenth Army was transferred to the Battle of Verdun.[2] On the first day on the Somme, eleven Fourth Army divisions (from XIII Corps, XV Corps, III Corps, X Corps and VIII Corps) attacked astride the Albert–Bapaume road. The attack was completely defeated on the northern sector, so subsequent Fourth Army operations concentrated on the southern sector, handing control of the northern sector to the Reserve Army.

The plan for the Fourth Army during the Third Battle of Ypres (31 July – 10 November 1917), was to mount Operation Hush, an amphibious invasion of the Belgian coast. Once the Germans had been pushed back from the Passchendaele–Westroosebeke ridge and an advance begun on Roeselare and Torhout, the XV Corps would mount the coastal operation. As the Ypres fighting became bogged down, the Fourth Army divisions were drawn off as reinforcements until the army was effectively disbanded.

The Fourth Army was reformed in early 1918—once again under Rawlinson—following the virtual destruction and subsequent disbanding of the Fifth Army during the German offensive known as Operation Michael.

The Fourth Army spearheaded the British Hundred Days offensive that began with the Battle of Amiens and ended with the Armistice in November, 1918.

Order of Battle

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On the first day of the Somme the Fourth Army comprised:[3]

When reformed for the Battle of Amiens:[4]

In September 1918 the Army was the only British force reinforced with substantial American (AEF) forces:[5]

Commanders

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  • February 1916–February 1918 General Sir Henry Rawlinson
  • February–March 1918 General Sir William Birdwood (temporary)
  • April 1918–March 1919 General Sir Henry Rawlinson[6]

Second World War

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In the Second World War, no Fourth Army took the field but as part of the deception plans Operation Cockade and the later Operation Fortitude North, the Germans were encouraged to believe that a Fourth Army had been established with its headquarters in Edinburgh Castle and was preparing to invade Norway. The selection of the inactive Fourth Army was likely very deliberate because of its combat history during the First World War. That diverted and kept German units away from the real invasion zone in Normandy. In the subsequent Operation Fortitude South, the Fourth Army, with different units, was presented as part of the fictitious First United States Army Group (FUSAG) in its threat to the Pas-de-Calais.[7] After Operation Market Garden, the Fourth Army was notionally intended to conduct Operation Trolleybar, an amphibious assault upon the coast of the Netherlands and later along the German coast. It was to involve a landing by the phantom 76th Infantry Division until the deception was ended in January 1945.

Fictitious composition during Fortitude

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Fortitude North

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HQ at Edinburgh

Fortitude South

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HQ at Hathfield

References

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  1. ^ The British Armies of 1914-1918
  2. ^ Robson, Stuart (2007). The First World War (1 ed.). Harrow, England: Pearson Longman. pp. 61–62. ISBN 978-1-4058-2471-2 – via Archive Foundation.
  3. ^ Baker, Chris. "Battles of the Somme, 1916". The Long, Long Trail. Retrieved 4 December 2015.
  4. ^ Baker, Chris. "The Battle of Amiens". The Long, Long Trail. Retrieved 4 December 2015.
  5. ^ Hart, Peter (2008). 1918 A Very British Victory (2 ed.). London: Phoenix. p. 446. ISBN 978-0-7538-2689-8.
  6. ^ Major A. F. Becke, History of the Great War: Order of Battle of Divisions, Part 4 (1944) pp. 99–105
  7. ^ Roger Hesketh. Fortitude: The D-Day Deception Campaign. St Ermins Press. 1999. ISBN 978-0-316-85172-5
  8. ^ Thaddeus Holt. The Deceivers: Allied Military Deception in the Second World War. Phoenix. 2005. ISBN 978-0-7538-1917-3
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