Ejército de Bolivia
Cáceres played a major role in the reorganization of the Peruvian Southern Army. This Army was deployed around the city of Tacna together with a Bolivian Army led by the President of Bolivia himself, General Narciso Campero. However, the political instability created after Nicolás de Piérola successfully overthrew Mariano Ignacio Prado hampered the actions of the Allied Army against the Chileans.