Harispe served in the Army of Aragon until 1813. In 1814, he was sent to Barcelona to serve as reinforcements to Soult, who after Vitoria was tasked with preventing the Duke of Wellington from invading southern France. During the retreat into France, he was forced to burn his own castle in his native town to prevent it being used by the Spanish. After the Battle of Orthez, he covered the retreat of the army. After having fought a Portuguese division at Tarbes on 20 March 1814, Harispe served in the Battle of Toulouse, fought after Napoléon had already abdicated. Tasked with defending the heights at Calvinet, he defended these redoubts to the utmost. His leg had to be amputated after it was shattered by a cannonball.