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Several scenes include full frontal male and female nudity of African slaves presented very matter-of-factly in the context of degradation. There are no sexual scenes.
There are two sequences on board slave ships which show slaves being whipped and abused. These sequences include, among other things, shootings, slashings, and drownings. One of the scenes includes a death in childbirth with the body thrown overboard. These scenes are very bloody indeed, even to the point of blood spraying on a character's face from a lashing. Compared to those sequences, the other incidents of violence are almost inconsequential.A number of men who have been shot to death in battle are shown.
None.
A couple of characters smoke a pipe or a cigar during relaxation and reflection. Drinking is presented in such an off-hand manner as to go largely unnoticed.
The scenes of violence as well as the predicaments the slaves find themselves in are very intense and might be frightening/disturbing to some viewers.