Amistad
From Conservapedia
The Amistad Case was a United States legal case in 1841 that involved the question of what was to be done with slaves who had mutinied and taken over the Spanish ship Amistad and now sought asylum in the United States as free men.
The government of the Van Buren administration sought to return the men to Spanish custody, but they were defeated before the Supreme Court by John Quincy Adams who succesfully argued the case for their freedom.
Sources
The New American Desk Encyclopedia, Penguin Group, 1989
