The invasion of Martinique of 1809 was a successful British amphibious operation against the French West Indian island of Martinique that took place between 30 January and 24 February 1809 during the Napoleonic Wars. Martinique, like nearby Guadeloupe, was a major threat to British trade in the Caribbean, providing a sheltered base from which privateers and French Navy warships could raid British shipping and disrupt the trade routes that maintained the British economy. The islands also provided a focus for larger scale French operations in the region and in the autumn of 1808, following the Spanish alliance with Britain, the Admiralty decided to order a British squadron to neutralise the threat, beginning with Martinique.