Inca Empire>- Ultimate Disaster Survivalists, in a sick sort of way...

Interesting story from National Geographic; a little long, but well worth the read.  These guys were the ultimate survivalists, and fit into the definition of 'terrorist'...yet, not as bad as Genghis Khan. 

Lofty Ambitions of the Inca

Rising from obscurity to the heights of power, a succession of Andean rulers subdued kingdoms, sculpted mountains, and forged a mighty empire.

"Llamas used as:  Jeeps, K-rations and fatigues, all in one...
Playing panpipes carved from the bones of enemies and war drums fashioned from the flayed skins of dead foes, his soldiers advanced toward the Colla forces, a moving wall of terror and intimidation."  Read more...