The US officers and soldiers who fought the Vietnam War did so on battlefields that were very different from the ones many American GIs faced in WWII. In the Second World War, as we discussed it, often large conventional forces clashed on the open plains of Europe, the deserts of North Africa, and the jungles of the Pacific theater. Frederick Downs, Jr., in The Killing Zone, describes a different kind of war in Vietnam. Write an essay that explains the nature of battle as he typically experienced it, as well as four of the major problems that he and his men commonly faced. What toll did this war take on him, both mentally and physically?