 Complete the following phrase:  While in America, Mansfield was made lieutet on 25 November 1778, when only 18, two years earlier than the official minimum age of 20, joining the ship of the line HMS Albion as a junior lieutet. In March the following year he transferred to the 74-gun ship HMS Sultan in which he was in action at the Battle of Grenada the following year and the Battle of Martinique a few months later. At the start of 1780, Mansfield was made first lieutet of the newly captured frigate HMS Fortunée which was present as a repeating frigate at the disastrous Battle of the Chesapeake which led to Cornwallis surrendering his army. In January 1782 Mansfield was again in action at the 