Dumanoir commanded the six ship vanguard of the French fleet, with Scipion, Duguay-Trouin, Mont Blanc, Intrépide and Neptuno. Nelson's attacks left these ships downwind of the main confrontation and Dumanoir did not immediately obey Villeneuve's orders to return to the battle. When the ships did turn back, most of them only exchanged a few shots before retiring.
Infernet and his crew, wanting to join the fight, eventually disobeyed Dumanoir's orders and joined the battle, followed by the Spanish 80-gun Neptuno (Captain Cayetano de Valdés). Intrépide fought against Leviathan, Africa, Agamemnon, Ajax, Orion and Conqueror, only to strike her colours at about 17:00, badly damaged with half of her crew dead.
Intrépide was later scuttled on Admiral Collingwood's orders, partly to avoid recapture by the counter-attack of the six ship French squadron led by Captain Julien Cosmao of Pluton, two days later, and partly because the severe gale made it impossible to save most of the damaged prizes.
Roche, Jean-Michel (2005). Dictionnaire des bâtiments de la flotte de guerre française de Colbert à nos jours 1 1671–1870. ISBN978-2-9525917-0-6. OCLC165892922.