Two Minutes Silence (1933)
Two Minutes Silence is a 1933 Australian melodrama set during World War I based on Les Haylen's anti-war play. It was the fourth and last feature film by the Sydney-based McDonagh sisters, Paulette, Isobel and Phyllis, who called it "by far the best picture we produced". It is considered Australia's first anti-war movie and is a lost film.
More at Wikipedia.