The 5th Infantry Division is currently inactive. But the Red Diamond has a superior combat record from the First World War, World War II, Vietnam, and Operation Just Cause, the invasion of Panama. This blog is a short history of the 5th Infantry Division during the Vietnam War and includes a video by the Roving Historian, Jim Broumley featuring archival footage and photos of the Red Devils in Vietnam.

The 5th Infantry Division (Mechanized) is nicknamed the "Red Devils" or the "Red Diamond" for the simple design of its shoulder sleeve insignia. The 5th I.D., currently inactive, is a regular army division that saw service in WWI, WWII, Vietnam, and Operation Just Cause in Panama.