Finally, traders and landowners in the Acre River decided to give the leadership of a new insurrection to a former student of the Military School of Porto Alegre, José Plácido de Castro, from São Gabriel, who, at the head of an improvised corps of rubber tappers, started operations in the village of Xapuri, in upper Acre, and arrested the Bolivian authorities (August 1902). After sparse and successful fighting, Plácido de Castro besieged Puerto Alonso, causing the surrender of the Bolivian forces (February 1903).
