There is one scene where it is suggested that two French soldiers might have the intent to rape or otherwise brutalize a young schoolteacher.

A man and a woman kiss passionately.

This movie is more violent than any of the other films in the Hornblower series.

There are a number of battle scenes including deaths by gunshots, cannonfire and stabbing with some blood.

SPOILER ALERT

Many people are guillotined at the order of a French officer. While none of this is shown graphically, these scenes may be very disturbing to a younger viewer.