The 47th Infantry Regiment is an infantry regiment of the United States Army. Constituted in 1917 at Camp Syracuse, New York, the regiment fought in the Great War, and was later inactivated in 1921. Reactivated in 1940, the regiment fought during World War II in North Africa, Sicily, and Western Europe, then was inactivated in 1946. During the Cold War, the regiment saw multiple activations and inactivations, with service both in the Regular Army and the Army Reserve; it fought in Vietnam. Ultimately it was reactivated as a training regiment, and as of 1999, it has been assigned to Fort Moore and consists of two active battalions.

The 4th Infantry Division is a division of the United States Army based at Fort Carson, Colorado. It is composed of a division headquarters battalion, three brigade combat teams, a combat aviation brigade, a division sustainment brigade, and a division artillery.