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.

Shoulder sleeve insignia (SSI) are cloth emblems worn on the shoulders of US Army uniforms to identify the primary headquarters to which a soldier is assigned. The SSI of some army divisions have become known in popular culture.