I Corps (United Kingdom)
I Corps formation badge WWI (left) and WWII (right).
First World War
Second World War
Cold War 1951–1994
|The Prince of Orange|
Sir Douglas Haig
Sir Charles Monro
Sir Hubert Gough
Sir Arthur Holland
Sir John Dill
Sir Harold Alexander
I Corps ("First Corps") was an army corps in existence as an active formation in the British Army for most of the 80 years from its creation in the First World War until the end of the Cold War, longer than any other corps. It had a short-lived precursor during the Waterloo Campaign.
- 1 Napoleonic precursor
- 2 Prior to the First World War
- 3 First World War
- 4 Second World War
- 5 British Army of the Rhine
- 6 General Officers Commanding
- 7 Notes
- 8 References
- 9 External sources
Assembling an army in Belgium to fight Napoleon’s resurgent forces in the spring of 1815, the Duke of Wellington formed it into army corps, deliberately mixing units from the Anglo-Hanoverian, Dutch-Belgian and German contingents so that the weaker elements would be stiffened by more experienced or reliable troops. As he put it: ‘It was necessary to organize these troops in brigades, divisions, and corps d’armee with those better disciplined and more accustomed to war’. He placed I Corps under the command of the Prince of Orange and it was this corps that was first contacted by the advancing French at Quatre Bras on 16 June 1815. However, Wellington did not employ the corps as tactical entities, and continued his accustomed practice of issuing orders directly to divisional and lower commanders. When he drew up his army on the ridge at Waterloo, elements of the various corps were mixed up, and although he gave the Prince of Orange nominal command of the centre, that officer had different forces under him. Subsequent to the battle, the corps structure was re-established for the advance into France, I Corps being commanded by Maj-Gen Sir John Byng, the Prince of Orange having been wounded at Waterloo.
Composition of I Corps in the Waterloo Campaign
- 1st (British) Division (British Guards)
- 3rd (British) Division (Anglo-Hanoverian)
- 2nd (Netherlands) Division (Dutch-Belgian)
- 3rd (Netherlands) Division (Dutch-Belgian)
Prior to the First World War
After Waterloo the army corps structure largely disappeared from the British Army, except for ad hoc formations assembled during annual manoeuvres (e.g. Army Manoeuvres of 1913). In 1876 a Mobilisation Scheme for eight army corps was published, with 'First Corps' based on Colchester. In 1880 First Corps' organization was:
- 1st Division (Colchester)
- 1st Brigade (Colchester)
- 2nd Brigade (Colchester)
- Divisional Troops
- F/1st Brigade Royal Artillery (Ipswich), D/1st Brigade RA (Woolwich)
- 2nd Division (Chelmsford)
- 1st Brigade (Chelmsford)
- 2nd Brigade (Warley)
- Divisional Troops
- I/4th Brigade RA (Newcastle), N/4th Brigade RA (Woolwich), M/4th Brigade RA (Newcastle)
- 3rd Division (Gravesend)
- 1st Brigade (Gravesend)
- 2nd Brigade (Chatham)
- Divisional Troops
- O/4th Brigade RA (Weedon), A/5th Brigade RA (Weedon)
- Cavalry Brigade (Maldon)
- Corps Artillery (Colchester)
- E Battery C Brigade RHA (Woolwich), H Battery A Brigade RHA (Woolwich)
- G/1st Brigade RA (Woolwich), B/5th Brigade RA (Sheffield)
- Corps Engineers (Colchester)
- A (Pontoons) Troop Royal Engineer Train (Aldershot)
- C (Telegraph) Troop Royal Engineer Train (Aldershot)
- 23rd Company Royal Engineers and Field Park (Chatham)
This scheme had been dropped by 1881. The Stanhope Memorandum of 1891 (drawn up by Edward Stanhope when Secretary of State for War) laid down the policy that after providing for garrisons and India, the army should be able to mobilise three army corps for home defence, two of regular troops and one partly of militia, each of three divisions. Only after those commitments, it was hoped, might two army corps be organised for the unlikely eventuality of deployment abroad.
When war with the Boer Republics was imminent in September 1899, a Field Force, referred to as the Army Corps (sometimes 1st Army Corps) was mobilised and sent to Cape Town. It was, in fact, 'about the equivalent of the First Army Corps of the existing mobilization scheme', and was placed under the command of Gen Sir Redvers Buller, General Officer Commanding-in-Chief of Aldershot Command. However, once in South Africa the corps never operated as such, and the three divisions (1st, 2nd and 3rd) were widely dispersed.
The 1901 Army Estimates introduced by St John Brodrick allowed for six army corps based on the six regional commands (Aldershot, Southern, Irish, Eastern, Northern and Scottish) of which only I Corps (Aldershot Command) and II Corps (Southern Command on Salisbury Plain) would be entirely formed of regular troops. However, these arrangements remained theoretical, the title 'I Corps' being added to Aldershot Command. In early October 1902 a memorandum was issued showing the organization and allocation of the 1st Army Corps, to which Sir John French had recently been appointed in command:
- 1st Division
- 2nd Division
- 3rd Division
- 1st Cavalry Brigade (South Cavalry Barracks)
In 1907 the title changed to 'Aldershot Corps' but reverted to simply 'Aldershot Command' the following year. Finally, the Haldane Reforms of 1907 established a six-division British Expeditionary Force for deployment overseas, but only Aldershot Command possessed two infantry divisions and a full complement of ‘army troops’ to form an army corps in the field.
First World War
Pre-war planning for the British Expeditionary Force (BEF) did not envisage any intermediate headquarters between GHQ and the six infantry divisions, but it was assumed that if corps HQs became necessary, then the GOC Aldershot Command would automatically become GOC I Corps in the field. On mobilisation in August 1914 the decision was made to conform to the two-division army corps organisation employed by the French armies alongside which the BEF was to operate. Sir Douglas Haig, then commanding at Aldershot, therefore took I Corps HQ to France with 1st Division and 2nd Division under command, and it remained on the Western Front throughout the war. It had a peripheral part at the Battle of Mons, then saw hard fighting at the Battle of the Aisne and First Battle of Ypres in 1914, at the Battle of Aubers Ridge in the Spring of 1915 and alongside the Canadian Corps at the Battle of Hill 70, as well in many other large battles of the First World War.
Composition of I Corps in First World War
The composition of army corps changed frequently. Some representative orders of battle for I Corps are given here.
Order of Battle at Mons 23 August 1914
- Brigadier-General, General Staff (BGGS): J.E. Gough VC
- Brigadier-General, Royal Artillery: H.S. Horne
- Colonel, Royal Engineers: Brig-Gen Spring R. Rice
- 1st Division
- 2nd Division
- Army Troops attached (20 August 1914)
By the time of the battles of Aubers Ridge and Festubert (May 1915), I Corps still had 1st and 2nd Divisions under command, but had been reinforced by 47th (1/2nd London) Division of the Territorial Force, and 1st Canadian Division. Once the era of trench warfare had set in on the Western Front (1915–17), the BEF left its army corps in position for long periods, so that they became familiar with their sector, while rotating divisions as they required rest, training, or transfer to other sectors.
General Officer Commanding: Lieut-Gen Sir Arthur Holland
BGGS: Brig-Gen G.V. Hordern
Deputy Adjutant & Quartermaster-General: Brig-Gen N.G. Anderson
Commander, Royal Artillery: Brig-Gen H.C. Sheppard
Commander, Heavy Artillery: Brig-Gen F.G. Maunsell
Commander, Engineers: Brig-Gen H.W. Gordon
- 15th (Scottish) Division
- 16th (Irish) Division
- 55th (West Lancashire) Division (transferred to III Corps on 8 October)
- 58th (2/1st London) Division (transferred from VIII Corps/First Army on 14 October).
Second World War
Battle of France
During the Second World War, I Corps' first assignment was again to the British Expeditionary Force (BEF) where it was commanded by General Sir John Dill, and then Lieutenant General Michael Barker from April 1940. After the Germans broke through Allied lines in the Battle of France in May 1940, the BEF was forced to retreat to Dunkirk for evacuation to England. The Commander-in-Chief (C-in-C) of the BEF, General Lord Gort, ordered Barker to form the rearguard with I Corps to cover the evacuation, and surrender to the Germans as a last resort. However, the acting commander of II Corps, Major General Bernard Montgomery, advised Gort that Barker was in an unfit state to be left in final command, and recommended that Major General Harold Alexander of the 1st Division should be put in charge. Gort did as Montgomery advised, and in the event the bulk of I Corps was successfully evacuated. As Montgomery recalled: '"Alex" got everyone away in his own calm and confident manner'.
General Officer Commanding: Lieutenant General M.G.H. Barker
- 1st Infantry Division
- 2nd Infantry Division
- 48th (South Midland) Infantry Division
- Royal Artillery
- 27th Army Field Regiment (21/24 & 37/47 Batteries)
- 140th (5th London) Army Field Regiment (366 (10th London) & 367 (11th London) Batteries)
- 3rd Medium Regiment (2/11 & 6/10 Batteries)
- 5th Medium Regiment (15/17 & 20/21 Batteries)
- 52nd (East Lancashire) Light Anti-Aircraft Regiment (154, 155 & 156 Batteries)
- 2nd Light Anti-Aircraft Battery
- 1st Survey Regiment
- Royal Engineers
- 102nd, 107th, 221st Army Field Companies
- 105th Corps Field Park Company
- 13th Corps Field Survey Company
- Infantry—Machine Gun
After returning to England I Corps then remained in the United Kingdom, based at Hickleton Hall in South Yorkshire within Northern Command on anti-invasion duties, preparing defences to repel a German invasion of the United Kingdom.
I Corps, now commanded by Lieutenant General John Crocker, then took part in the Normandy landings on 6 June 1944 where, along with XXX Corps, under Lieutenant General Gerard Bucknall (who had commanded I Corps between April and August 1943), it was a spearhead corps of Lieutenant General Miles Dempsey's British Second Army, itself part of the 21st Army Group. The corps was then involved in the Battle of Normandy in fierce attritional fighting for control of the Normandy beachhead. After fighting for two months in the Battle for Caen, I Corps was subordinated on 1 August 1944 to the Canadian First Army, commanded by Lieutenant General Harry Crerar, for the remainder of the Normandy campaign  and the subsequent operations in the Low Countries and Germany until 1 April 1945, I Corps Headquarters then took over administration of the 21st Army Group's logistics area around the port of Antwerp, Belgium until the end of the war.
Composition of I Corps in NW Europe Campaign
- Corps troops:
- 4th Army Group, Royal Artillery
- 150th (South Nottinghamshire Hussars Yeomanry) Field Regiment, RA (suspended animation January 1945)
- 53rd (London) Medium Regiment, RA (209 & 210 (London) Batteries)
- 65th Medium Regiment, RA (222 (Fraserborough) & 223 (Banffshire) Batteries)
- 68th Medium Regiment, RA (233 & 234 Batteries)
- 79th (Scottish Horse Yeomanry) Medium Regiment, Royal Artillery
- 51st (Lowland) Heavy Regiment, RA
Assignments of corps to armies, and divisions to corps, changed frequently during the campaign:
As of 6 June 1944
As of 7 July 1944
- British 3rd Infantry Division
- 3rd Canadian Infantry Division
- 51st (Highland) Infantry Division
- 59th (Staffordshire) Infantry Division
- 6th Airborne Division
As of 1 August 1944 (now part of First Canadian Army)
- 51st (Highland) Infantry Division
- 6th Airborne Division (returned to United Kingdom 3 September 1944)
- 49th (West Riding) Infantry Division
- 7th Armoured Division
British Army of the Rhine
After the defeat of Germany, the 21st Army Group became the British Army of the Rhine (BAOR), and I Corps, under the command of Lieutenant-General Gwilym Ivor Thomas, was transformed into a corps district, with an administrative, rather than combat, role. It was disbanded in 1947.
However, in October 1951 the corps was reactivated to become the principal combat element of the BAOR, with its HQ based in Bielefeld. In March 1952, following the reactivation of 6th Armoured Division, its component formations were:
Included as part of this was Canada's contribution to the NATO land forces in Germany. A Canadian mechanised brigade remained part of BAOR until 1970. The size of this force, 6,700, was such that it was referred to within British circles as a "light division".
In a following 1958-60 reorganisation the Corps was formed into three mixed armour/infantry divisions including five brigade groups, which were in 1965 brought together into three centralised divisions. With the end of National Service, manpower across the whole of BAOR dropped from around 77,000 to 55,000.
In the late 1970s the Corps was reorganised as four small five battle group armoured divisions plus a roughly brigade sized infantry 'Field Force'. It then comprised:
- 1st Armoured Division
- 2nd Armoured Division
- 3rd Armoured Division
- 4th Armoured Division
- 5th Field Force
Following the 1981-3 reorganisation, the Corps consisted of 1st and 4th Armoured Divisions, which would have manned the front line against the anticipated attack by the Soviet 3rd Shock Army, plus in an in-depth, reserve role the 3rd Armoured Division and finally the 2nd Infantry Division which was tasked with rear-area security.
- 1st Armoured Division
- 3rd Armoured Division
- 4th Armoured Division
- 2nd Infantry Division (in UK)
- Artillery Division (HQ Ripon Barracks, Bielefeld)
With the end of the Cold War, in 1992 1 (BR) Corps was disbanded, and its HQ closed. Some of the staff serving in HQ 1(BR) Corps were reassigned to the new HQ UK Support Command (Germany) which was formed from the rump of HQ BAOR. The remainder of the staff formed the British component (50% of the total staff in the HQ) in the Headquarters Allied Command Europe Rapid Reaction Corps (HQ ARRC), a newly instated multi-national NATO Rapid Reaction Corps HQ. The Corps Commander reported to the Supreme Allied Commander Europe SACEUR, but had no troops under command except when assigned to ARRC by NATO member nations, for operations or for exercises. HQ ARRC moved to Rheindahlen in 1994.
General Officers Commanding
Commanders have included:
- 1815 General The Prince of Orange
From 1901 to 1905 the commander of the troops at Aldershot was also commander 1st Army Corps
- 1 October 1901: General Sir Redvers Buller
- 25 October 1901: Lieutenant-General Sir Henry Hildyard, temporary
- 15 September 1902: Lieutenant-General Sir John French
- 1914 Lieutenant-General Sir Douglas Haig
- 1914–1915 Lieutenant-General Sir Charles Monro
- 1915–1916 Lieutenant-General Sir Hubert Gough
- 1917–1918 Lieutenant-General Sir Arthur Holland
Note: I Corps was disbanded at the end of the First World War and reformed at the start of the Second World War
- 1939–1940 General Sir John Dill
- 1940 Lieutenant-General Michael Barker
- 1940 Lieutenant-General Harold Alexander
- 1940–1941 Lieutenant-General Laurence Carr
- 1941–1942 Lieutenant-General Henry Willcox
- 1942–1943 Lieutenant-General Frederick Morgan
- Apr-Aug 1943 Lieutenant-General Gerard Bucknall
- 1943–1945 Lieutenant-General John Crocker
- 1945 Lieutenant-General Sidney Kirkman
- 1945–1947 Lieutenant-General Ivor Thomas
Note: I Corps was disbanded in June 1947 and reformed in late 1951
- 1951–1953 Lieutenant-General Sir Dudley Ward
- 1953–1954 Lieutenant-General Sir James Cassels
- 1954–1956 Lieutenant-General Sir Hugh Stockwell
- 1956–1958 Lieutenant-General Sir Harold Pyman
- 1958–1960 Lieutenant-General Sir Michael West
- 1960–1962 Lieutenant-General Sir Charles Jones
- 1962–1963 Lieutenant-General Sir Kenneth Darling
- 1963–1966 Lieutenant-General Sir Richard Goodwin
- 1966–1968 Lieutenant-General Sir John Mogg
- 1968–1970 Lieutenant-General Sir Mervyn Butler
- 1970–1972 Lieutenant-General Sir John Sharp
- 1972–1974 Lieutenant-General Sir Roland Gibbs
- 1974–1976 Lieutenant-General Sir Jack Harman
- 1976–1978 Lieutenant-General Sir Richard Worsley
- 1978–1980 Lieutenant-General Sir Peter Leng
- 1980–1983 Lieutenant-General Sir Nigel Bagnall
- 1983–1985 Lieutenant-General Sir Martin Farndale
- 1985–1987 Lieutenant-General Sir Brian Kenny
- 1987–1989 Lieutenant-General Sir Peter Inge
- 1989–1991 Lieutenant-General Sir Charles Guthrie
- 1991–1992 Lieutenant-General Sir Jeremy Mackenzie
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- "65 Medium Regiment RA (TA)".
- "68 Medium Regiment RA (TA)".
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- "51 (Lowland) Heavy Regiment RA (TA)".
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- Official History 1939-40: Ellis, Major L.F., History of the Second World War, United Kingdom Military Series: The War in France and Flanders 1939-1940, London: HMSO, 1954.
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- The Long Long Trail
- Official History 1939-40
- Royal Artillery 1939-45
- British Army Locations from 1945
- Late 70s-82 order of battle
- 1989 order of battle