The Secretary at War was a political position in the English and later British government, with some responsibility over the administration and organization of the Army, but not over military policy. The Secretary at War ran the War Office. After 1794 it was occasionally a Cabinet-level position, although it was considered of subordinate rank to the Secretaries of State. The position was combined with that of Secretary of State for War in 1854 and abolished in 1863.

Henry Pelham was a British Whig statesman who served as Prime Minister of Great Britain from 1743 until his death in 1754. He was the younger brother of Thomas Pelham-Holles, 1st Duke of Newcastle, who served in Pelham's government and succeeded him as prime minister. Pelham is generally considered to have been Britain's third prime minister, after Robert Walpole and the Earl of Wilmington.