Promoted to captain on 3 May 1689, Leake was given command of the fifth-rate HMS Dartmouth; he distinguished himself when he led the convoy that broke the barricading boom at Culmore Fort thereby lifting the Siege of Derry in July 1689 during the Williamite War in Ireland.[1] He transferred to the command of the fourth-rate HMS Oxford in the Mediterranean Fleet in October 1689 and to the command of the third-rate HMS Eagle in May 1690 and saw action in some of the heaviest fighting (70 of his men were killed) at the Battle of Barfleur in May 1692.