Lieutenant Hornblower by C.S. Forester
In the first film, mutiny seems the only option for Hornblower as the captain's behaviour becomes increasingly erratic. The story continues in the second film as Hornblower and his shipmates capture a fort from the Spaniards after a fierce battle atsea. Success quickly turns sour as Hornblower faces a possible court martial for mutiny - the sentence for which is death.