1802) was an English army officer, historian and military writer, and spy in the pay of the French government.
[2] At the end of the Seven Years' War, he served in the 77th Regiment of Foot at the siege of Havana, and then at New York, in 1762.
The regiment was broken up soon afterwards, but Mante then joined Henry Bouquet in his 1763 campaign that formed part of Pontiac's War.
During 1764 Mante was attached to John Bradstreet, as brigade major, in the expedition leading to the siege of Fort Detroit.
He became involved in British intelligence work through dealings in the 1770s with the government official John Robinson; but he had already by then been recruited to spy for the French, from 1769, by Jean-Charles-Adolphe Grant de Blairfindy.