Lieutenant-Admiral Michiel de Ruyter virtually controlled the seas around the south coast of England after a battle that took place in what year ?
Treaty of Breda (1667):  Lieutenant-Admiral Michiel de Ruyter virtually controlled the seas around the south coast of England, following his successful Raid on the Medway, and his presence encouraged English commissioners to sue for peace quickly. Raid on the Medway: The Raid on the Medway during the Second Anglo-Dutch War in June 1667, sometimes called the Battle of the Medway, Raid on Chatham or the Battle of Chatham, was a successful and daring attack conducted by the Dutch navy deep upriver targeting the largest English naval battleships at a time when most were virtually unmanned and unarmed, laid up due to lack of funding in the fleet anchorages off Chatham Dockyard and Gillingham in the county of Kent.
1667