In 1961, Noël is a French soldier in the Algerian war. His comrades, formerly opposed to the war, now oppress civilians, kill and torture. To stay faithful to his pacifist values, he will do something radical.
I agree with all that has been said about the purely technical shortcomings of this movie. However, in 1972 the numerous dark sides of the war in Algeria were subjects of massive denial. This civil war represented a terrible trauma for the country. After 50 years and the publication of some archives one can only start to grasp the atrocity of this conflict with at last some objectivity.
This is why I think shooting this movie in 1972 was a courageous and meaningful achievement. 35 years later, some first-hand account of former enlisted soldiers tend to confirm the most gruesome elements of this fiction.