You know, the conspirators that assassinated Caesar thought the same thing. They were "saving the Republic" from the tyranny of Caesar. But as soon as they killed Caesar, they had no plan on what steps to take next. Rome fell into a series of civil wars out of which Octavian (Caesars adopted son, and assassination conspirator), took power. He effectively ended the Roman Republic and birthed the Roman Empire.

So you can say "Huh. I've seen this somewhere before"

(I'm not entirely versed on my history, so I could be slightly off and missing a few details. Do your own research)