GRANBY, JOHN MANNERS, MARQUESS OF (1721— 1770), British soldier, the eldest son of the third duke of Rut land, was born in 1721, educated at Eton and Trinity college, Cambridge, and elected M.P. for Grantham in 1741. Four years later he received a commission as colonel of a regiment raised to assist in quelling the Highland revolt of 1745. This corps never got beyond Newcastle, but as a volunteer on the duke of Cumberland's staff, Granby saw active service in the last stages of the insurrection. He was in the Flanders campaign of was promoted major-general in 1755, and three years later was appointed colonel of the Royal Horse Guards (Blues). He had married the daughter of the duke of Somerset, and in 1754 had begun his parliamentary connection with Cambridgeshire, for which county he sat until his death. Dispatched to Germany in 1758, he was present at the battle of Minden, and later succeeded to the command of the British contingent after Lord Sackville's disgrace. On July 31, 1760, Granby stormed Warburg at the head of the British cavalry, capturing 1,500 men and ten pieces of artillery. A year later (July 15, 1761) the British' defended the heights of Vellinghausen with great bravery, and in the last cam paign, at Gravenstein and Wilhelmsthal, Homburg and Cassel, Granby's men bore the brunt of the fighting and earned the greatest share of the glory.
Returning to England in 1763 the marquess found himself the popular hero of the war. He was appointed to the Ordnance on July 1, 1763, and three years later he became commander-in chief. In this position he was attacked by "Junius." He died at Scarborough on Oct. 18, 1770.
Two portraits of Granby were painted by Sir Joshua Reynolds, one of which is now in the National Gallery. His contemporary popularity is indicated by the number of inns and public-houses which took his name and had his portrait as sign-board.