Like most other officer of his corps, he emigrated around the time of Louis XVI's flight to Varennes, going to Ath, then Koblenz, where the comte d'Artois made him his aide-de-camp. He accompanied him in this role during the campaign of 1792 and on his trip to Russia in 1793, where they were well received by Catherine II of Russia. He then went to England, and in spring 1795 joined the Quiberon expedition. Tasked by Joseph-Geneviève de Puisaye with commanding a unit of Chouans charged with attacking the rear of the Republican army, he was prevented by the forces of Hoche and, tricked by false signals, forced to retreat. He fulfilled several different missions to the Vendée and the île d'Yeu, with the comte d'Artois. Returning to London, he hastened to return to Russia but arrived there at the moment of Catherine's death, fell victim (like most French Royalists in Russia) to Paul I's changeability and was soon forced to leave. He returned to France and stayed for a time in Paris, with police consent, until he was arrested in 1806 and held prisoner for a long while in the Temple.