1. Dr Strangelove, or: How I Learned to Stop Worrying and Love the Bomb (1964)
2. Threads (1984)
3. Full Metal Jacket (1987)
4. Lifeboat (1944)
5. The Third Part of the Night (1971)
6. Closely Observed Trains (1966)
7. Come and See (1985)
8. A Field in England (2013)
9. Black Moon (1975)
10. The Man Who Lies (1968)
Actually much easier than I thought! I didn't have the scrape the bottom of the barrel where my war film watching was concerned - all of the above are in fact fantastic films and all favourites of mine.
Sure, a few are probably not 'War' in the conventional sense, but thank you IMDb genre filter.