On 18 January 1808 "Général de Brigade" Charles Lefebvre-Desnouettes replaced Dahlmann in command of the regiment. The regiment was in Madrid when the populace rose on 2 May and eight of the officers, including Major Pierre Daumesnil, were wounded as well as five officers of the Mamluks. The regiment took part in General Montbrun's charge up the road at Somosierra (30 November) but lost no officers for the Spanish gunners only managed to get off one salvo before the Polish and French cavalry got amongst them with the sabre. (This was the second charge, not the one in which the 3rd squadron of the First Regiment of Polish "Chevau-Légers" was practically wiped out.)