Carlisle Barracks is a United States Army facility located in Carlisle, Pennsylvania. The site of the U.S. Army War College, it is the nation's second-oldest active military base. The first structures were built in 1757, during the French and Indian War between Great Britain and France in the colonies.

Carlisle is a borough in and the county seat of Cumberland County, Pennsylvania, United States. Carlisle is located within the Cumberland Valley, a highly productive agricultural region. As of the 2020 census, the borough population was 20,118; including suburbs in the neighboring townships, 37,695 live in the Carlisle urban cluster. Carlisle is the smaller principal city of the Harrisburg–Carlisle metropolitan statistical area, which includes Cumberland and Dauphin and Perry counties in South Central Pennsylvania.