Lieutenant General Watkin Tench (6 October 1758 - 7 May 1833) was a British marine officer who is best known for publishing two books describing his experiences in the First Fleet, which established the first settlement in Australia in 1788. His two accounts, Narrative of the Expedition to Botany Bay and Complete Account of the Settlement at Port Jackson provide an account of the arrival and first four years of the colony. Tench joined His Majesty's Marine Forces, Plymouth division, as a second lieutenant on 25 January 1776, aged 17. He was promoted to first lieutenant on 25 January 1778 at the age of 19 years and 3 months.