Do you know this great movie about Caesar and Rome?

I do not know the same, except that somewhere in the movie a witch
says the new Caesar will die and see a "Sun with blood" and that night
he was poisoned.

They won the final battle when they requested aid from an old legion
that hates them and tries to kill the new Caesar but he manages to
persuade them to fight on his side.

I would love to see this movie again.