I am not sure, when I read other reviews, quite what some people expect. This is the history, in film, of a terrible event almost 100 years ago. Understandably the film quality is sometimes poor, monochrome and in parts a little tedious. The whole war was one of stalemate so no one should expect the global movement and recognisable events seen in WW2. From a different time and perspective, this long programme is very informative, gives a clear understanding of what led up to and influenced the whole sorry mess, is extremely well narrated and astonishingly moving. It shows what my Grandfather experienced whilst still a lad of 19 or so and whilst I find it hard to empathise with my Fathers experiences in WW2, I just cannot begin to comprehend how these young men coped.
My generation could see the consequences of this conflict in their relatives (or the lack of them!) but my teenaged children don't even know that such a war took place. This film will stand for generations to come as a living history of how stupid man can be and why we must continue to question the actions of Leaders if we value our hard won freedom. As I said about that other masterpiece, The World at War, modern history should be compulsory in all secondary schools and this should be a part of the syllabus.
If you can afford it, buy it, watch it over the long winter nights and see if you too are not overcome by anger at those in charge, amazement at the stupidity of many at home and emotion at the waste and loss of life. It will at least help you understand why the French Army had so many morale problems in 1939/40. Just do the numbers!