The most important strategic defeat of Walker…
April 1856 CE
It is in this battle that the soldier and drummer Juan Santamaría sacrifices himself by setting the Filibuster stronghold on fire.
In parallel with Enmanuel Mongalo y Rubio in Nicaragua, Santamaría will become Costa Rica's national hero.
Walker deliberately contaminates the water wells of Rivas with corpses.
Later, a cholera epidemic will spread to the Costa Rican troops and the civilian population of the city of Rivas.
Within a few months nearly ten thousand civilians will have died, almost ten percent of the population of Costa Rica.