Top Ten Terrifying Civilizations

From the April 22, 2011, Listverse.  Always, the site has pictures and much more information and reasons.  I just list 'em for the most part.

And, the Gangnam Nation is not one of them.  No Style there.

10.  Celtic
9.  Maori  (Well, that tongue thing scares me.)
8.  Mongols
7.  Apache Tribes
6.  Vikings (only of you don't show them what's in your wallet.)

5.  North Koreans  (And they don't Gangnam Style either.)
4.  Romans
3.  Aztecs (Well, that human sacrifice thing.)
2.  Nazis
1.  Soviet Union (Especially under Uncle Josef.)

Be Skeered.  Be Very Askeered.  --Cooter