Just compare old War documentaries, like “Victory at Sea” with what’s out there now.
Actually on the Military Channel I prefer older documentaries about WWII (WWII In HD, WWII In Color) to anything comparable about Vietnam or the Persian Gulf War or OIF or the GWOT.
It seems that all of the contemporary documentaries are full of "howevers" i.e. the US Army won all major battles in Vietnam however the war was opposed on the homefront, then the mandatory pictures of draft card burners.