What evil regimes (real or fictional) do you most dislike?

[GBaxter]

EXCLUDING the Roman Empire, what disliked current, recent or
historic / ancient evil regime/s (be they real ones and / or also any fictional ones written about in any books) would you most like to topple or have toppled and please say HOW you reckon you would or would've (seriously or humorously) successfully gone about doing or achieving it ?

Anything mentioned, doesn't have to only be a historic - ancient, or politically related regime, but can be social, business, computer, technological, or economic related.

[Dan Diffendale]

Being careful, of course, not to stray into modern politics...

What's Not Allowed:

We reserve the right to modify/delete your posts without warning to remove profanity, or inflammatory language, or any other violations of these rules.

1. No illegal topics (porn, bombmaking, inciting hatred, hacking, pirating, etc.). No modern politics or religion (though discussion of ancient political/religious themes is allowed, so long as it does not degenerate into proselytizing or attacks on other faiths.) If you must tie everything to the war in Wherever-stan, please take it elsewhere. This forum does not exist as a debate site for current world events -- it was created to discuss the ancient world, specifically the Roman military.
(The Rules)