Two Arabian Knights

Two Arabian Knights 1927 is an American comedy film, directed by Lewis Milestone and starring William Boyd, Mary Astor and Louis Wolheim. A silent film, Two Arabian Knights was produced by Howard Hughes and was distributed by United Artists. The screenwriters were James T. ODonohue, Wallace Smith, and George Marion Jr.

During the First World War, two American soldiers become trapped in no mans land. Expecting to die, W. Daingerfield Phelps III William Boyd decides to fulfill his fondest desire to beat up his sergeant since training camp, Peter OGaffney Louis Wolheim. While they are brawling, the Germans sneak up and capture them.In a German prison camp, the two become friends when Phelps takes responsibility for an unflattering caricature he drew of a guard, rather than let OGaffney take the blame. The two escape, stealing the white robes of Arab prisoners to blend in with the snow. However, they encounter and are forced to join a group of similarly garbed Arab prisoners being sent by train to Constantinople. ........

Source: Wikipedia