The Lost Battalion is a 2001 American war drama television film about the US 77th Division's Lost Battalion during World War I, which was cut off and surrounded by German forces in the Argonne Forest during the Meuse-Argonne Offensive of 1918. The film was directed by Russell Mulcahy, written by James Carabatsos, and stars Rick Schroder as Major Charles Whittlesey. The film was shot in Luxembourg. It is an A&E Original Movie, premiering on the network on December 2, 2001. It is also played on A&E's sister networks such as The History Channel. It was released on home video in January 2002.

The Lost Battalion is the name given to the nine companies of the US 77th Division, roughly 554 men, isolated by German forces during World War I after an American attack in the Argonne Forest in October 1918. Roughly 197 were killed in action and approximately 150 missing or taken prisoner before the 194 remaining men were rescued. They were led by Major Charles W. Whittlesey. On 2 October, the 77th division launched an attack into the Argonne, under the belief that French forces were supporting their left flank and two American units including the 92nd Infantry Division were supporting their right. Within the 77th sector, some units, including Whittlesey's 308th Infantry, were making significant headway. Unknown to Whittlesey's unit, the units to their left and right had been stalled. Without this knowledge, the units that would become known as the Lost Battalion moved beyond the rest of the Allied line and found themselves surrounded by German forces. For the next six days, suffering heavy losses, the men of the Lost Battalion and the American units desperate to relieve them would fight an intense battle in the Argonne Forest.