America Goes Over (1918)
Behind the Door (1919)
Behind the Front (1926)
The Big Parade (1925)
The False Faces (1919)
The Four Horsemen of the Apocalypse (1921)
Four Sons (1928)
The Girl Who Stayed at Home (1919)
The Heart of Humanity (1918)
J’Accuse (1919)
The Love Light (1921)
My Four Years in Germany (1918)
The Secret Game (1917)
The Strong Man (1926)
Wings (1927)

Collections and boxsets that include silent era World War I films:
World War I Films of the Silent Era (1916-1975)