Spartacus (1960)

Revealing mistake: During the initial breakout of the Gladiatorial training school an armed guard is stabbed on a balcony and falls to the arena below. He gets up and walks into the doorway adjacent to where he had fallen, apparently satisfied that his part was completed.

Gracchus: This republic of ours is something like a rich widow. Most Romans love her as their mother but Crassus dreams of marrying the old girl to put it politely.

Trivia: Marcus Publius Glabrus is accused of neglecting to erect moats and stockades for his camp - a fatal mistake no Roman commander would have normally committed. The standard procedure was to build a camp with these defense measures at any stop, even if no enemy contact was expected. In order to forestall lack of wood for the stockade, each legionary carried two stockade poles with him.