The Battle of Sant Llorenç de la Muga was fought on 13 August 1794 between an attacking Spanish–Portuguese army led by the Conde de la Unión and a French army commanded by Jacques François Dugommier. The local French defenders headed by Pierre Augereau and Dominique Pérignon repulsed the allies. The Spanish garrison of Fort de Bellegarde surrendered a month later.

Luis Fermín de Carvajal, 1st Count of la Unión became a general officer in the army of the Kingdom of Spain. In 1794 during the French Revolutionary Wars, he commanded the Spanish Army in a mostly unsuccessful effort to hold back the army of the First French Republic. He died in battle fighting the French.