 At the subsequent Battle of Wagram, Bessières once again led the cavalry reserve and had a horse killed under him which caused consternation amongst the Guard.Napoleon congratulated him on making his Guard cry but also chided him for not netting more prisoners because he lost his horse.Replacing Jean-Baptiste Bernadotte in the command of the Army of the North a little later in the same year, the newly created Duke of Istria successfully opposed the British Walcheren expedition.