July 1 1839 A slave revolt occurred on the slave ship Amistad. It became a symbol in the United States in the movement to abolish slavery.
La Amistad from Wikipedia    https://en.wikipedia.org/wiki/La_Amistad

AMISTAD REBELLION  -   Blazon Stone     https://www.youtube.com/watch?v=c2WupaTaGjg
LA AMISTAD    https://www.youtube.com/watch?v=YpwMX1gUM3Q