These chapters are dependent on few and somewhat biased sources though the bias is, at least, bilateral since the PAVN veterans all mouth the party line as to how heroic were the North Vietnamese in standing up to and ultimately defeating the all-powerful Americans. In those interviews no mention is made of the massive Soviet and Chinese aid North Vietnam received.
Unfortunately, the notion promoted by the US military to this day that in Vietnam the Americans scored all those "battlefield victories" goes unchallenged here. In truth the whole idea of what a victory is, even what constitutes a "battle", had to be re-thought in that conflict.
There also are some outright distortions, such as the reason behind Operation Linebackers I and II--the notorious "Christmas Bombing" of Hanoi. It was not Hanoi's intransigence that caused the Paris peace talks to stall. The problem was the administration in Saigon--our own side, that is--that showed a sudden and very ill-timed independence and balked at signing the accords, knowing it had no popular support in the South.
For sheer quantity of material this disc is worth the $7,00 price and more.