Made commander-in-chief of Reserve Artillery in Italy (1803), Laclos died shortly afterward in the former convent of St. Francis of Assisi at Taranto, probably of dysentery and malaria.
Pus comandant general al armatei italiene (1803), Laclos a murit după scurt timp în fosta mănăstire a Sf. Francisc de Assisi, la Taranto, cel mai probabil de dizenterie sau malarie.