On August 26, 1891 the Battle of Concón was developed where besides serving as Chief of Staff, Körner was given the command of the first brigade and the corresponding responsibility to effect the attack in the west wing of the offensive. His unit crossed the Aconcagua River at 11:25 a.m. for the purpose of providing security for the cross of the second and third brigades which did so between 7 and 8 kilometers toward the east by other fords. The opposition from the Balmacedist troops was as expected, as they did not utilize the natural obstacles that the terrain offered (the Aconcagua River and Petra Gorge) he was able to rapidly disperse the constitutional forces which earned him great appraisals for his bravery. His participation in the skirmish extended until the end of the battle at approximately 15:30, where he immediately began to organize the congressional forces to confront what was coming. Since he realized that the Battle of Concón would not be decisive, he reorganized the congressional forces and prepared himself to fight the next battle. Many Balmacedist forces had fled and their commanders guided them to the rear to reorganize themselves in order to prepare for a new confrontation.