Charles-Henri-Louis d'Arsac, chevalier de Ternay was a French naval officer. Most active in the Seven Years' War and the War of American Independence, Ternay was the naval commander of a 1762 expedition that successfully captured St. John's Newfoundland. He was appointed commander of the Marine Royale, French naval forces, as part of the project code named Expédition Particulière that brought French troops to American soil in 1780. He died at Hunter House on Washington Street, which was headquarters for the French fleet in Newport, Rhode Island.

Expédition Particulière was the codename given by the Kingdom of France for the plan to sail French land forces to North America to support the colonists against Britain in the American Revolutionary War. Numbering 5,500 troops, the expedition arrived in America on 11 July 1780, led by the Comte de Rochambeau.