Lieutenant-General Sir Manley Power KCB, ComTE (1773 – 7 July 1826) was a British Army officer who fought in a number of campaigns for Britain and rose to the rank of lieutenant general.

He is also remembered for jointly causing the removal of Sir George Prévost, governor-in-chief of British North America, for Prevost's refusal to press the attack on Plattsburgh, New York, in 1814, during the War of 1812.

[3] After rising to Lieutenant-Colonel[4] of the 32nd Regiment of Foot, he entered the Peninsular War and was attached to the Portuguese army under the command of Sir William Beresford and was promoted to lieutenant-general in 1813.

[7] Finally the 3rd was under the command of Charles Colville at the Battle of Nivelle where it took part in the main attack and then captured the bridge at Amotz under heavy resistance.

I see he has gone to war about trifles with the general officers I sent him, which are certainly the best of their rank in the army; and his subsequent failure and distresses will be aggravated by that circumstance; and will probably with the usual fairness of the public be attributed to it.

[9]In December, Wellington's former Quartermaster General, Sir George Murray, was sent to Canada with the local rank of lieutenant-general, specifically to order Prévost to return to London to explain his conduct of the Plattsburg campaign.

Manley Power took part in the Battle of New Orleans,[10] where Pakenham was killed, which unbeknown to its participants occurred after the Treaty of Ghent was signed in Belgium, but it did not take effect until it was ratified by the United States in February 1815.

He was then reassigned to Europe in 1815 to rejoin the 3rd Division, which was still under the command of Charles Colville, to lead the 2nd Brigade, as part of the British Army force occupying Flanders and France.