British WW II movies always got big play in Canada.  Not so often in the US. Other titles from the time (or the decades following): In Which We Serve, The Cruel Sea (always a favourite of mine, because my father was a Chief Petty Officer on a Corvette--the ship, not the car--as well.); We Dive At Dawn, Malta Story and--funny nobody's mentioned it--the original 1954 Dunkirk movie, which concentrated mainly on the "little boats of Britain" aspect.