[2] In 1781, Caldagues serving in the American Revolutionary War, as part of the Expédition Particulière, the expeditionary force commanded by Count Rochambeau, was promoted to lieutenant colonel.

[3] Escaping from the French Revolution, he emigrated to Spain and on 9 June 1793, was appointed sargento mayor (staff officer) of the Legión Róyale, a Spanish military unit composed of émigré troops.

[2] When news of Marshal Saint-Cyr's victory at the Battle of Cardedeu (16 December) reached Caldagues,[2] he decided to withdraw his blockade of Barcelona and return to his lines behind the Llobregat, where he regrouped his 11,000–12,000 troops, with Reding joining him with some 3,000–4,000 troops that remained of the Spanish forces routed at Cardedeu.

[2] Caldagues was finally captured at the Battle of Molins de Rei (21 December 1808), and interned in France, where he remained prisoner until the end of the war.

On 26 June 1815, the Duke of Angoulême appointed him military commander of the department of Ariège (department) and the command of the 10th Military district (Toulouse),[3] post previously held by Jules de Polignac, future prime minister of France under Charles X.