I cannot agree more with the 2 already existing reviews, this documentary had everything to become a classic, one to use to educate the future generations :
- a fascinating period of history
- a lot of research into facts & quotes
- unbelievable recoloured archives of extreme quality and powerful images we've never seen before
Why they thought it necessary to go back and forth in time is beyond me !
I still give it a 7 because I was fascinated by the images and the facts, but with a simple chronological narration, that would have been a straight 10.