Battle of Diamond Rock

Background. Diamond Rock, a 175-meter-high basalt island south of Grande Anse du Diamant, was fortified in January 1804 by Commodore Samuel Hood. The British garrison, commanded by Lieutenant James Wilkes Maurice, used guns on the cliffs to force ships entering Fort-de-France Bay to take slower routes, allowing interception by blockading vessels. This strategic position remained in British hands until the arrival of a large Franco-Spanish fleet in May 1805 changed the situation.

Assault. Admiral Villeneuve was ordered by Napoleon to recapture Diamond Rock. A Franco-Spanish flotilla was dispatched to storm the rock, engaging the British defenders who had been unable to be ousted previously. The attacking force approached under false colours, and when the British garrison raised British colours and opened fire, the Spanish were taken by surprise; such a false flag was considered a legitimate ruse de guerre during that era. The assault involved two French seventy-fours, a frigate, a corvette, a schooner, and eleven gunboats.

Outcome. Lieutenant Maurice surrendered on 3 June 1805 after enduring fierce bombardment and running out of water and ammunition. A court martial honourably acquitted him, noting he did everything in his power against a superior force. The capture of Diamond Rock was the only success the combined fleet achieved during their Caribbean campaign. The rock remained in French hands until the British recaptured it in 1809.