Sébastiani became a Count of the Empire, and commanded IV Corps in the Peninsular War, notably at the Battle of Ciudad-Real, the Battle of Talavera, and the Battle of Almonacid. In 1810, he took Linares, Jaén, Granada and Málaga. Troops under his command included a group of Polish "émigré" soldiers, among them Albert Grzymała, who served on his staff and was later noted for his friendship with Frédéric Chopin.