By the ordinance of 24 July 1828, he was then sent to Greece as a field marshal to participate in the Morea expedition (1828), under the orders of Marshal Maison, during the Greek War of Independence. At the head of the 1st brigade of the expeditionary forces, he liberated the city of Coron (on 7 October 1828) from the Turkish-Egyptian occupation troops of Ibrahim Pasha. He finally left the Greek soil after four months of mission in the Peloponnese, in 1829, after having completely liberated Greece from the occupier. Upon returning from this campaign, he was promoted by king Charles X Commander of the Royal and Military Order of Saint-Louis and then, Grand Commander of the Order of the Redeemer by the new independent Greek State, in 1830.