José de San Martín was defeated by the Luso-Brazilian armies, his allies Estanislao López and Francisco Ramírez continued hostilities against Buenos Aires for its inactivity against the invasion. Pueyrredón called the Army of the Andes and the Army of the North (led by Belgrano) to aid Buenos Aires in the conflict. Guido noted to San Martín that if both armies did that, the north of Argentina and Chile would be easily reconquered by the royalists. San Martín also knew that most of the soldiers of the Army of the Andes would not be willing to aid Buenos Aires in the civil war, as most
José de San Martín Freire captured Talca. Las Heras routed royalist outposts in Juncalito and Potrerillos. Bernardo O'Higgins, who came from Los Patos pass, defeated the royalists at Las Coimas. This allowed the main columns to gather at Aconcagua valley, meeting at the slopes of Chacabuco. Royalist commander Rafael Maroto converged his armies on that location as well. Maroto had 2,450 men and 5 pieces of artillery, San Martín had 3,600 men and 9 pieces of artillery. The misdirection that concealed the path of the bulk of the Army allowed San Martín this advantage, as other royalist forces were scattered in other regions of