The Argentine Patriotic League (Liga Patriótica Argentina) was a Nacionalista paramilitary group, officially created in Buenos Aires on January 16, 1919, during the Tragic week events.
Presided over by Manuel Carlés, a professor at the Military College and the Escuela Superior de Guerra, it also counted among its members the deputy Santiago G. O'Farrell (1861-1926).
Even if they appeared in several Chilean cities they concentrated their activity in the provinces of Antofagasta, Tarapacá and Tacna, those that were annexed during the War of the Pacific (1879-1883).
In these places the Patriotic Leagues launched attacks against Peruvian newspapers, societies and citizens contributing to the Chilenization of Tacna, Arica and Tarapacá.
The passivity of the Chilean authorities of Iquique helped the Patriotic Leagues to achieve their principal goal: to frighten the Tarapacán families of Peruvian origin.