Second Battle of Rivas: Juan Santamaría burns down the hostel where William Walker's filibusters are holed up.

The Second Battle of Rivas occurred on 11 April 1856 between Costa Rican militia under General Mora and the Nicaraguan forces of American mercenary William Walker. The lesser known First Battle of Rivas took place on the 29 June 1855 between Walker's forces and the forces of the Chamorro government of Nicaragua.