71. Come And See, 1986
A harrowing but worthy portrait of a young Russian boy's experiences during The Second World War as he turns from green teenager to hardened resistance fighter. The Second World War always brought out the best in Soviet filmmakers and director Elem Klimov found his ideal subject in this harrowing story of a teenage boy's view of the conflict. The lad Florya is taken off by a group of partisans, fighting in the woods of Byelorussia in 1943. They disappear and he is left to wander, gun in hand, until he rejoins them at the end as an active and hardened participant, his young face prematurely aged.
Hard to find, but highly-recommended. I'll never be the same.
War and Peace. 1968 Sergey Bondarchuk Russian version.
Waterloo. 1971 Sergy Bondarchuk version aain.
All the other good ones have been named.
Don't think it was a movie but Jerzy Kosinski's novel "The Painted Bire" , about a Polish orphan in WWII, is worth looking at
That was powerful, and a classic. Andrei Tarkovsky's Ivan's Childhood (Ivanovo detstvo, 1962) was another good one with a similar theme.
The popular classics were The Longest Day and The Battle of the Bulge. For a lot of kids growing up thirty years ago nothing else came close. Maybe Saving Private Ryan will be in the same category. Band of Brothers surely is.