1-397:3:100th DIV (TNG)

The 1st Battalion, 397th Regiment (1-397), part of the 3rd Brigade, 100th Division (Training) (1-397/3:100th DIV (TNG)), has a distinguished history as a training unit within the United States Army Reserve. Originally constituted in 1921 as part of the Organized Reserves, the 397th Infantry Regiment was activated for service during World War II, where it participated in campaigns across Europe. In the postwar era, the regiment was reorganized under the 100th Division with a primary focus on training new soldiers. Today, 1-397/3:100th DIV (TNG) continues its legacy by providing advanced individual and leader training, supporting Army readiness and transformation efforts.