The Lost Battalion is a 1919 American silent World War I film directed by Burton L. King and produced by Edward A. MacManus. The movie describes the events of the encircled units of the U.S. 77th Division by German forces in the Argonne Forest in 1917. The movie features many actual soldiers, including the commanding officer Major Charles W. Whittlesey who portrayed themselves.
The Colt M1911 is used by U.S. officers including Major (then Captain) George McMurtry.
Unknown Revolvers
Some American and German soldiers can be seen with unknown revolvers.
Rifles
Springfield M1903
During their time in the barracks in the U.S., the soldiers wield M1903 Springfield rifles.
Enfield M1917
As the men of the 77th Division are stationed in France, they are seen using M1917 Enfield rifles with M1905 bayonets. This is correct since the Enfield was more massively produced in World War I as the Springfield M1903 was in short supply when the US entered the war. The Lost Battalion may be the first movie ever to feature this rifle (except for war footage), since the Enfield M1917 was first issued only two years earlier.
Gras Mle. 1874
The majority of German soldiers are armed with Gras Model 1874 rifles, standing in for the more period correct Mausers.
Full-length rifles that appear to be Krag-Jørgensen M1898s are also used by the soldiers.
Beaumont-Vitali M1871/88
At least one of the German soldiers is briefly seen with a Dutch Beaumont-Vitali M1871/88 rifles
Unknown Rifles
Machine Guns
BAR M1918
The Browning Automatic Rifle is used by one soldier of the Lost Battalion. Like the M1917 Enfield, this is most likely the first film that features this gun.
Hotchkiss M1914
What appears to be a French Hotchkiss M1914 machine gun is used by German soldiers.