War film
Robert Eberwein names two films as anti-war classics. The first is Jean Renoir's  prisoner of war masterpiece La Grande Illusion (The Grand Illusion, 1937). Renoir's critique of contemporary politics and ideology celebrates the universal humanity that transcends national and racial boundaries and radical nationalism, suggesting that mankind's common experiences should prevail above political division, and its extension: war. The second is Stanley Kubrick's Paths of Glory (1957). The critic David Ehrenstein writes that Paths of Glory established Kubrick as the "leading commercial filmmaker of his generation" and a world-class talent. Ehrenstein describes the film as an "outwardly cool/inwardly passionate protest drama about a disastrous French army maneuver and the court-martial held in its wake", contrasting it with the "classic" All Quiet on the Western Front's story of an innocent "unstrung by the horrors of war".

Mixed genres: Comedy gave scope for satire, and post-war film-makers merged comedy and anti-war sentiment in films as varied as Stalag 17 (1953) and Dr. Strangelove (1964). Black comedies like Mike Nichols's Catch-22 (1970), based on Joseph Heller's satirical novel about the Second World War, and Robert Altman's M*A*S*H (1970), set in Korea, reflected the attitudes of an increasingly sceptical public during the Vietnam War.
Other genres were combined in Franklin J. Schaffner's Patton (1970), about real life General George S. Patton, where combat scenes were interleaved with commentary about how he waged war, showing good and bad sides to a command. It and MASH became the two most profitable war/anti-war films made up to that time, and Patton won seven Academy Awards.

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References: 

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Further reading: Castellan, James W.; van Dopperen, Ron; Graham, Cooper C. (2014). American Cinematographers in the Great War, 1914–1918. New Barnet. ISBN 978-0-86196-717-9.
DeBauche, Leslie Midkiff (1997). Reel Patriotism: the Movies and World War I. University of Wisconsin Press. ISBN 0-299-15400-9.
Kane, Kathryn R. (1982). Visions of War: Hollywood Combat Films of World War II. UMI Research. ISBN 0-8357-1286-9.
Lim, Song Hwee; Ward, Julian (2011). The Chinese Cinema Book. Palgrave Macmillan. ISBN 978-1-84457-580-0.
Slater, Jay (2009). Under Fire: a century of war movies. Ian Allan Publishing. ISBN 978-0-7110-3385-6.
Stites, Richard (1995). Culture and Entertainment in Wartime Russia. Indiana University Press. ISBN 0-253-35403-X.
Taylor, Mark (2003). The Vietnam War in History, Literature, and Film. University of Alabama Press. ISBN 0-8173-1401-6.

External links: Imperial War Museum: First World War Film Collection Archived 2015-06-27 at the Wayback Machine
Mobilizing Movies! The U.S. Signal Corps Goes to War, 1917-1919, Documentary on the U.S. film effort during the First World War (2017)
Archived 2015-06-27 at the Wayback Machine
Michael Wilmington & Dann Gire: World on War: A Film Discussion
British Film Institute: 10 great battleship and war-at-sea films