 Lagos ordered the "Santiago" 5th Line Regiment to catch Cáceres in a pincer maneuver, while the rest of the brigade were to hit the Peruvians with a frontal charge.The "Santiago" performed the flanking attack, and three companies of the other units assaulted the trenches, but had to be reinforced with another five.The Chileans broke through and took Redoubt Nº 1, and Cáceres retreated to Redoubt Nº 2.