Camp Shelby is a U.S. Army post whose south gate is located at the southern boundary of Hattiesburg, Mississippi, along U.S. Highway 49. It was originally established during World War I, and has served almost continuously since then as a training site. Operated by the Mississippi National Guard, is the largest state-owned training site in the nation. Camp Shelby Joint Forces Training Center (CSJFTC), encompassing over 525 square kilometres of land is located in portions of Perry and Forrest Counties, in southern Mississippi. The size of the camp allows up to battalion-level maneuver training for infantry, live-fire mechanized infantry platoon exercises, field artillery firing, and a wide range of support activities.