She fought at Trafalgar under the command of Captain Israel Pellew, brother of Sir Edward Pellew. Pellew's captain of marines took the surrender of the overall commander of the French-Spanish fleet, Admiral Villeneuve, aboard the French ship Bucentaure (80 guns). However, he was not able to deliver Villeneuve's sword to the Conqueror as she had passed on to engage another ship and it was received by the captain of Mars.
Villeneuve, who spoke English, is alleged to have asked to whom he was surrendering. On being told it was Captain Pellew of the Conqueror, he replied "I am glad to have struck to the fortunate Sir Edward Pellew." When he was informed that the Conqueror's captain was Sir Edward's brother, he said, "His brother? What, are there two of them? Hėlas!" [1] On 2 February 1812, Conqueror was driven ashore on the coast of England between Sheerness and Chatham, Kent, during a storm.[2]
Conqueror was broken up in 1822.