Much of the movie is documented history. Many interviews with the NVA, VC, ARVN, and US Military.Well worth watching.
Been there, done that...Don’t need to see the film...
(I see it enough in my sleep at times)
Ken Burns does this very well. He takes documented history and distorts it to says what he wants to say and this is a warped account. Don’t believe me, read what Gen Giap had to say about how close they came to losing everything and credits their victory with Walter Cronkhite, the rest of the press, and the Left Wing politicians in the U.S.
You need to educate yourself.