John Ross should (and may) know better. The Viet Cong and Viet Minh may have been armed with capture weapons early on, but by the 1960s they had new production AK-47s, Katuska (sic) rockets, motors, and so forth. The NVA had everything mother Russia and China could ship them. Up to and including Mig-21 fighters, tanks, and of course the heaviest air defense system outside of Moscow, with radars, heavy AAA and SAMs. Even with all that, they didn't win on the battle field but rather on the campuses of the United States and in the halls of Congress. The end, for South Vietnam, came with the second of two conventional all arms invasions, with armored divisions that would have made Patton or Rommel envious. The first was stopped with the help of US airpower by the ARVN, when the second came, US airpower was either gone or forbidden from interviening, while the ARVN was starved for supplies.