What countries were involved in the Amistad case?

West Africa, Spain, and America.

The slaves were from West Africa, and the Spanish are the ones that illegally captures these Africans to sell them into slavery. America involved themselves in solving the case by trying yo figure out wether these were Africans born in Spain or in Africa and were they would belong. The slaves took over La Amistad and killed almost all the crew of the boat near Cuba,although Cuba wasn't really involved.