The Action of 26 April 1797 was a minor naval engagement during the French Revolutionary Wars in which a Spanish convoy of two frigates was trapped and defeated off the Spanish town of Conil de la Frontera by British ships of the Cadiz blockade. The British vessels, the ship of the line HMS Irresistible and the Fifth-rate frigate HMS Emerald, were significantly more powerful than the Spanish frigates, which were on the last stage of a voyage carrying treasure from Havana, Cuba, to the Spanish fleet base of Cadiz.