Guerra de los Diez Años
The mambí forces were made up of volunteers who mostly had no military training and banded together in loose groups who acted independently to attack the Spanish troops during the Ten Years' War. Even with these limitations, the mambises made up for it with their cunning, fierceness, and bravery. It is estimated that 8,000 poorly armed and underfed mambises inflicted close to 20,000 casualties on the well-trained Spanish soldiers during the Ten Years' War.