Handed over by Dumouriez to the Austrians on 3 April 1793, Beurnonville was not exchanged until November 1795. He entered the service again, commanded the Army of Sambre-et-Meuse and Army of the North, and was appointed inspector of infantry of the Army of England in 1798. He was sent as ambassador to Berlin in 1800, and to Madrid in 1802.
Napoleon made him a senator and count of the empire. In 1814 he was a member of the provisional government organized after the abdication of Napoleon. He followed Louis XVIII to exile in Ghent, and after the second restoration was made marquis and marshal of France (1816).