Mattei Lluberas and the Puerto Rican Commission in New York had been trying to convince President William McKinley to invade Puerto Rico for sometime.
The Commission or "volunteers", as they were otherwise known, that landed at Arroyo on 1 August 1898 consisted of: Pedro Juan Besosa, José Budet, Domingo Collazo, Mateo Fajardo, Emilio González, Antonio Mattei Lluberas, Rafael Marxuach y Abrams, Rafael Muñoz, and Warren Sutton (the only American in the group).
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