During the Civil War era, Fort Snelling served as an induction and training center for nearly twenty-five thousand soldiers. Many of them fought in the Civil War. Around fourteen hundred of the troops raised at the fort served in the U.S.–Dakota War of 1862. After that war, a concentration camp for Dakota non-combatants was established near the fort. Following the Civil War, the fort supported U.S. military expeditions against American Indians and the garrisoning of western posts.