The 5th Infantry Division was a regular army infantry division of the British Army. It was established by Arthur Wellesley, 1st Duke of Wellington for service in the Peninsular War, as part of the Anglo-Portuguese Army, and was active for most of the period since, including the First World War and the Second World War and was disbanded soon after. The division was reformed in 1995 as an administrative division covering Wales and the English regions of West Midlands, East Midlands and East. Its headquarters were in Shrewsbury. It was disbanded on 1 April 2012.
The 5th Division during the Peninsular War under the command of General James Leith was present at most of the major engagements including the Battle of Bussaco, the Battle of Sabugal, the Siege of Almeida, the Battle of Badajoz, the Battle of Salamanca, the Battle of Vitoria, the Siege of San Sebastian, the Battle of Nivelle and the Battle of the Nive.
The Division was also present during the Waterloo Campaign first seeing action at the Battle of Quatre Bras then at the Battle of Waterloo under the command of Lieutenant General Sir Thomas Picton.