One of the best of the Celtic chieftains in what is now France, he was beaten by Julius Caesar at Alesia, in one of the most famous battles of ancient history (a rare example of a double siege--Caesar had beseiged a force in the town, and then was himself beseiged, therefore being trapped in a tight ring around the town). Vercingetorix was taken to Rome as a captive and eventually executed. No Geneva Convention then.
