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.