 Then seven troops were detached and deployed to the French colony of Saint-Domingue in 1795 during the Haitian Revolution; they took part in an action at Mirebalais in June 1797 in which they helped defeat 1,200 ex-slaves who were sympathetic to new regime in France.The regiment was renamed for Princess Frederica in 1798 as the 14th (The Duchess of York's Own) Regiment of (Light) Dragoons and allowed to use the Prussian Eagle as its badge.The regiment was dispatched to Lisbon in December 1808 to join Sir Arthur Wellesley's Army which was engaged in the Peninsular War.