>Shooting at other humans, killing them, is not something we are designed psychologically to handle. But obviously if you feel you must kill another to avoid be

>Shooting at other humans, killing them, is not something we are designed psychologically to handle. But obviously if you feel you must kill another to avoid being killed, you may do it. And then your mind must reconcile that memory. Drugs can help you avoid it. The vast majority of soldiers in Vietnam (and in any modern war) don't kill anyone at all, and don't get into firefights. Modern armies are basically 90%+ logistics. Drug abuse was spread throughout all roles in the military in Vietnam, it wasn't exclusive to combat roles.