Promoted to rear-admiral on 7 January 1756, Saunders was sent to Gibraltar as Second in Command of the Mediterranean Fleet.[1] In January 1757 he was advanced to Commander-in-Chief, Mediterranean Fleet remaining in post until May 1757.[1] In October 1758 he was appointed Commander-in-Chief, English Channel a post he held till May 1759. He took command of the fleet tasked with carrying James Wolfe to Quebec in January 1759 and, having been promoted to vice admiral on 14 February 1759, he consolidated the dead general's victory after the Battle of the Plains of Abraham in September 1759 by devoting great energy to keeping the British Army, now under the command of Colonel George Towshend, well supplied.[1] Saunders and Towshend were joint signatories for Great Britain after the French garrison capitulated.[1] In April 1760 he resumed his role as Commander-in-Chief, Mediterranean Fleet and blockaded Cádiz preventing the French and Spanish fleets from sailing.[1] He was installed as Knight of the Bath in May 1761[3] and, in the action of 31 May 1762, his fleet chased down and captured the Spanish treasure ship Hermione off Cape St Mary.[1] He acquired estates at Gunton in Suffolk and at Fishley in Norfolk in 1762.[4]