It seems like it would be more beneficial to simply execute or imprison leaders that had been overthrown. For example, if Napoleon had simply been executed, he could not have returned to France to attempt retaking power. Were they exiled for moral reasons, or something else entirely?
Hi, not discouraging a broader discussion on this topic, but since you mention Napoleon specifically, you may be interested in this post from the FAQ
Unfortunately, the account of the person who made the featured answer has since been deleted, but if you have follow-up questions for any of the other users in that thread, since the thread is now archived, ask them here and tag the relevant user to notify them.