During the campaign and
Battle of Corunna in 1808–1809, he served as Sir
John Moore's adjutant general and was promoted to major-general in 1810. During the remainder of the
Peninsular War he commanded an infantry division under the
Marquess of Wellington (later the Duke of Wellington). He was first appointed to command the
6th Division on 9February 1812. During the
Battle of Salamanca, his division played a key part by defeating French General
Bertrand Clausel's counterattack. He then led his division in the
Siege of Burgos campaign. From 26January to 25June 1813, Clinton was absent and
Edward Pakenham took over the 6th Division. For his conduct at the
Vitoria campaign, Clinton was made a
Knight Grand Cross of the Order of the Bath (GCB). He was absent again from 22July to October, when he again assumed command of the 6th Division. He was given the local rank of lieutenant general in 1813. He took part in the subsequent victories at the battles of
the Nivelle,
the Nive,
Orthez and
Toulouse. At the end of the Peninsular War he was made a lieutenant general and inspector-general of infantry, and was awarded the
Army Gold Cross with one
clasp. ==Waterloo==