5th Division (United Kingdom)

5th Division (United Kingdom)
Unit name	5th Division
Dates	1809–2012
Country	United Kingdom
Branch	British Army
Role	Infantry
Size	Division
Nickname	"Red Devil" (informal)
Notable commanders	Arthur Wellesley, 1st Duke of Wellington, Sir Charles Napier, Henry Rawlinson, Bernard Montgomery

5th Division (United Kingdom) was a regular infantry formation of the British Army with service spanning the Napoleonic era, the Crimean War, the Second Boer War, both First World War and Second World War, and Cold War commitments before final disbandment in the early 21st century. The division fought in major campaigns including the Peninsular War, the Battle of Waterloo, the Somme, Gallipoli Campaign, the Battle of France (1940), and the North African campaign, seeing a succession of commanders and reorganisations under reforms such as the Cardwell Reforms and the Haldane Reforms.

History

The division's lineage traces to Napoleonic formations under commanders linked to the Peninsular War and the Waterloo Campaign, later reconstituted for imperial conflicts in the Crimean War and the Second Boer War. Throughout the 19th century, the unit appeared in varying configurations during imperial expeditions alongside formations from the British Indian Army and units associated with the East India Company. Twentieth-century reforms and two global conflicts shaped its modern organisation, with interwar reductions and Cold War deployments influenced by doctrines developed after the Treaty of Versailles and during NATO integration.

Formation and Early Years

Originally raised during the Napoleonic Wars, the division's antecedents served under leaders connected to Arthur Wellesley, 1st Duke of Wellington and operated in campaigns including the Peninsular War and the Battle of Waterloo. In the mid-19th century the division or its equivalents were utilised in the Crimean War where commanders cooperated with figures from the Ottoman Empire and the French Empire under coalition command. Later nineteenth-century service encompassed expeditionary duties in the Second Anglo-Sikh War era and the Second Boer War, aligning with regiments from regions such as Yorkshire, Lancashire, Scotland, and Ireland as the British Army adapted to imperial needs and reforms initiated by policymakers like Edward Cardwell.

World War I

Reconstituted as a regular infantry division in 1914, the formation deployed to the Western Front where it participated in actions on the Somme, at Ypres, and during the German Spring Offensive (1918). Elements of the division fought alongside formations from the British Expeditionary Force, the Canadian Expeditionary Force, and the Australian Imperial Force in trench warfare that involved engagements linked to the Battle of the Somme (1916), the Third Battle of Ypres, and counterattacks during the Hundred Days Offensive. Commanders during this period coordinated with senior figures such as Douglas Haig and interfaced with corps- and army-level commands in operations influenced by developments like the introduction of the tank and changes in artillery tactics pioneered by officers associated with the Royal Artillery and Royal Engineers.

Interwar Period and Reorganisation

After demobilisation, the division underwent reductions aligned with the Ten Year Rule and interwar defence reviews led by the Washington Naval Conference era policymakers; it was periodically disbanded and reformed as peacetime establishments shifted. Reorganisation under the Haldane Reforms and later staff changes integrated peacetime brigades, territorial battalions from counties such as Kent, Surrey, and Norfolk, and placed emphasis on mechanisation influenced by theorists like J.F.C. Fuller and Basil Liddell Hart. The division's structure reflected broader British Army trends including the development of armoured doctrine, cooperation with the Royal Air Force, and preparations occasioned by rising threats from Nazi Germany.

World War II

Mobilised in 1939, the division was committed to the Battle of France (1940) where it formed part of the British Expeditionary Force and later elements evacuated during operations linked to Operation Dynamo at Dunkirk. Reconstituted and retrained, the division served in the Middle East and North African campaign, fighting in battles associated with commanders such as Bernard Montgomery and opposing forces of the German Afrika Korps under Erwin Rommel. Subsequent operations saw the division participate in the Italian Campaign and cooperative actions alongside the United States Army and Commonwealth formations, taking part in assaults that tied into the wider strategy of Operation Husky and the liberation of occupied Europe.

Postwar Service and Disbandment

In the postwar era the division was reshaped by the British Army of the Rhine commitments during the Cold War and participated in NATO collective defence arrangements alongside units from United States Army Europe and other alliance members. The 1957 Defence White Paper and later defence reviews drove reorganisations, reductions, and amalgamations affecting the division's brigades and battalions, which included affiliations with regiments such as the Royal Scots, Green Howards, and Royal Fusiliers. Final operational roles in peacekeeping and garrison duties occurred during deployments connected to theatres like Northern Ireland and expeditionary commitments, before the formation was disbanded under 21st-century restructuring of the British Army in 2012.

Category:Infantry divisions of the British Army Category:Military units and formations established in 1809 Category:Military units and formations disestablished in 2012