Guerra de las Naranjas
During the course of the War of the Oranges at the beginning of the Peninsular Wars, forces stationed in Alegrete resisted Spanish bombardment in 1801. But, the castle was already irreversibly in decline. Within twenty years, the conflict between Absolutists and Liberals erupted within Portugal, leading to combat within the castle's proximity, between troops of the Count of Vila Flor and royalist forces.