Carrera placed his infantry in the centre of his force, using his cavalry to flank the enemy positions, avoiding the Royalist artillery. Unfortunately, the patriot infantry appear to have been ordered to mount a sudden bayonet charge; they received a full volley from the Royalist guns, broke formation and fled from the field. Unsupported, the cavalry attacks also dispersed.
Juan Mackenna brought up a fresh division later in the day, but could not make much impact on the Royalist infantry. By nightfall, the patriots had dispersed completely, and on the following morning neither
Carrera nor
Mackenna had any units left to continue the attack. ==Aftermath==