On 21 March 1809 while in pursuit of a Spanish army, Subervie's 10th Chasseurs à Cheval Regiment fell into a deadly ambush. Spanish General Henestrosa noticed that the 10th Chasseurs had outstripped the other regiments in Antoine Charles Louis de Lasalle's division. Henestrosa concealed the Almanza and Infante Cavalry Regiments on either side of the main road near the village of Miajadas. When Subervie ordered his horsemen to charge a troop of Spanish horsemen that were deployed on the highway, he found his regiment surrounded by the Almanza and Infante Regiments. The 10th Chasseurs lost one officer and 62 men killed and 70 wounded before they fought their way out of the trap. In the Battle of Medellín on 28 March, Lasalle's four light cavalry regiments drove off the Spanish right wing cavalry and then charged the infantry. After putting up a good fight, the infantry finally took to its heels. A French participant recorded that the chasseurs were particularly brutal during the pursuit of the fleeing Spanish, cutting them down without mercy in revenge for their drubbing at Miajadas.