[citation needed] His successful operations were instrumental in compelling the Spanish government to make peace.

The coup d'état of 18 Brumaire in 1799 brought Moncey back to the active list, and during Napoleon's Italian campaign of 1800, he led a corps from Switzerland into Italy, surmounting all the difficulties of bringing horses and guns over the formidable Gotthard Pass.

After the Dos de Mayo Uprising and the beginning of the Peninsular War he advanced on Valencia to put down the revolt there, but he was unable to take the city.

However, when France was invaded in 1814, Moncey reappeared in the field and fought the last battle for Paris on the heights of Montmartre and at the barrier of Clichy.

He remained neutral during Napoleon's return to power, feeling himself bound to Louis XVIII by his engagements as a Peer of France, but after Waterloo he was punished for refusing to take part in the court martial of Marshal Michel Ney; by imprisonment and the loss of his marshalate and peerage.

He continued his military career as his last active service was as commander of an army corps of the Hundred Thousand Sons of Saint Louis in 1823.

By the 1830s Moncey was among the last marshals of the first empire, and on 15 December 1840 Napoleon's funeral was to take place after his mortal remains were brought back to France.