Non American Films for the top 100 list
Âîéíà è ìèð - The Russian version of War and Peace
Napoleon - the Abel Gance silent film
I agree on Das Boot
Seven Samurai, Yojimbo and Ran (choose any or all of these)
Henry V (Branagh) - if only because it is the complete version)unlike the 1944 Olivier one which was abridged), more accurately potrays the brutality of medaeval warfare and one gets better feel for the original 'bawdy' nature of the scenes involving Katherine and her Nurse.
Westfront 1918 - not Great acting, but the Western Front seen from the German side (made by Germans, most of whom were veterans)
Les Criox de Bois (The Wooden Crosses), again, a view of the Western Front by veterans - a powerful anti-war film which had been 'mined' for scenes by Hollywood (which must say something about the quality of the film).
I've alrady mentioned "The Four Feathers" (1939/Korda) and Zulu has already had a few honourable mentions.

If I think of any more, I'll add them.

Walrus