All Quiet on the Western Front (1930)
Director: Lewis Milestone. In 1914, a group of German teenagers volunteer for action on the Western Front, but they become disillusioned and none of them survives. Based on: Im Westen nichts Neues / Erich Maria Remarque. 130 min.

Big Parade (1925)
Director: King Vidor. This film, the first realistic motion picture about war, recounts the experiences of James Apperson, an American soldier in France during First World War who takes an amorous interest in Melisande, a french farm girl. During a violent battle his two comrades are killed and James is seriously wounded and eventually returned to the U.S. When he learns his former girl friend is in love with his brother James returns to France to find Melisande. 142 min.

Farewell to Arms (1932)
Director: Frank Borzage. A screen version of Ernest Hemingway's novel about romance and desertion during First World War in Italy. An American officer in the Italian ambulance corps is wounded, falls in love with an English Red Cross nurse and joins her in Switzerland. 90 min.

Gallipoli (1981)
Director: Peter Weir. Two young men in the Australia army in 1915 become part of the legendary First World War confrontation between the German allied Turks and Australia. 111 min.

Grand Illusion (1937; French and German dialogue, English subtitles)
Director Jean Renoir's classic anti-war film. A non-inflammatory First World War film set on the front in 1916, before American involvement. It is a study of a prisoner of war camp and the disillusionment of captors and prisoners alike. 111 min.

Hell's Angels (1930)
Directors, Howard Hughes, Marshall Neilan, Luther Reed, James Whale. Featuring: Ben Lyon, James Hall, Jean Harlow, John Darrow, Lucien Prival. The story of three Oxford University buddies, two English brothers and a German who are called to battle by their countries during First World War. Known for its exciting dogfight sequences between the R.A.F. and German fighter planes, the producer, Howard Hughes, used 137 pilots in all. The picture is perhaps most notable for introducing Jean Harlow to the screen. 129 min.

J'Accuse. (1937)
Directed by Abel Gance. J'Accuse was first released in 1919 as a silent film, but during the late thirties, appalled at the prospect of a second World War, Gance retold his story in a vastly different version to challenge the awful onslaught of history. Jean Diaz is a research scientist who survived the carnage of WWI and swears to dedicate his life to ending war, a burden which drives him to madness. When he discovers his work is being exploited by the military-industrial establishment, he summons up the millions of dead soldiers from First World War to rise from their graves, to bring the world to its senses. Gance's monumental work anticipated the terrible destructive capability of modern weapons and remains a powerful statement for today. 125 min.

Paths of Glory (1957)
Director: Stanley Kubrick. During First World War on the French front, a regiment of soldiers are set up for suicide missions and are generally manipulated in ways that show no regard for their lives. 89 min.

Sources: UC Berkeley Moffitt Library list of War and War-era movies, and IMdB