Unlike his father's, his title to fame did not rest on one fortunate opportunity. Though not the most famous, he was perhaps the ablest of all Napoleon's cavalry leaders, and distinguished himself at the Battle of Austerlitz in command of a light cavalry division on the left flank. Kellermann commanded a cavalry division under Jean-Andoche Junot in the 1807 Invasion of Portugal. At the Battle of Vimeiro he led the grenadier reserve and, after the French defeat, used his considerable diplomatic skills in negotiating the Convention of Cintra. At the Battle of Alba de Tormes on 28 November 1809, he led 3,000 troopers in a brilliant cavalry charge that routed the Duke Del Parque's Spanish army. He served with distinction on other occasions in the Peninsular War. His rapacity was notorious in Spain, yet Napoleon met his unconvincing excuses with the words, "General, whenever your name is brought before me, I think of nothing but Marengo."