Turner Classic Movies is hosting a World War 1 Film Festival every Friday in July.
The festival will feature well-known classics such as Sergeant York (1941), Paths of Glory (1957) and Lafayette Escadrille (1958). It will also include fairly obscure films such as Kameradschaft (1931), Ever in my Heart (1933) and Shoulder Arms (1918).
The latter is a Charlie Chaplin film. The full schedule can be found here. Get ready for some good viewing and/or DVR recording.