Violent warrior-like alien races that live to fight & die. Kokod Warriors/in "Dogtown Touruist Agency"/on Cadwal.
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This is a touchstone that I was about to note, but Vaidro beat me to it. I was going to point out the ritualism of their combat. Where does this come from? Has Jack found societies on Earth that engage in this kind of warfare? It's always been my understanding that war is hell and that there is no room for niceties of custom. I seem to recall an adage that goes something like: Combat eventually descends to the lowest form of savagery of the combatants.