In 2 November he was at the Battle of Pisagua, military action with which the Campaign of Tarapacá began. In that same month, already as captain, he participated in the reconnaissance of an area with two companies of Mounted Hunters, which he had under his command with a captain named Baharona, but both under the command of Lieutenant Colonel Francisco Vergara. During reconnaissance, he fought a fierce cavalry battle, in which they defeated a Peruvian-Bolivian cavalry force at Pampa Germania. Later, he was present in the Battle of San Francisco.