Also not enough can be said about how bad the US’ doctrine was during the war. For a big part of the Vietnam War our strategy was literally to just walk patrols out into the jungle to be ambushed because we knew that our artillery and air power (in the South, the North had their air space locked down) would let us get a lot of kills while our conscripts were being shot at, with virtually no plan for actually holding territory or winning the loyalty of Communism-supporting villages.