The action of 4 August 1800 was a highly unusual naval engagement that took place off the Brazilian coast during the French Revolutionary Wars. A French frigate force that had been raiding British commerce off West Africa approached and attempted to attack a convoy of valuable East Indiamen (large and heavily armed merchant vessels sailing from Britain to British India and China), two ships sailing for Botany Bay, and a whaler sailing for the South Seas' whale fishery. The small British ship of the line HMS Belliqueux escorted the convoy, which otherwise had to rely on the ships' individual armament to protect them from attack. Due to their large size, the East Indiamen could be mistaken for ships of the line at a distance, and the French commander Commodore Jean-François Landolphe was un-