The 97th Infantry Division was a unit of the United States Army in World War I and World War II. Nicknamed the "Trident division" because of its shoulder patch, a vertical trident in white on a blue background, it was originally trained in amphibious assaults as preparation for deployment in the Pacific Theater. It was deployed to Europe in 1944 when casualties from the Battle of the Bulge needed to be replaced.

The United States Army Reserve (USAR) is a reserve force of the United States Army. Together, the Army Reserve and the Army National Guard constitute the Army element of the reserve components of the United States Armed Forces.