Welcome to Fort Lincoln FortLincoln.com is the official website for the Fort Abraham Lincoln Foundation. The foundation's mission, since 1982, is to promote and manage the reconstruction, development and interpretation of the historical sites of old Fort Abraham Lincoln and the On-a-Slant Indian Village within Fort Abraham Lincoln State Park, near Mandan, ND, across the Missouri River from Bismarck, the state capital.  To tell the stories of Custer and the 7th Cavalry, and the Mandan Indians, the foundation has established the region's finest living-history interpretive program. Through the support of its members, the Mandan-Bismarck communities, and visitors from around the world, the foundation stands as a cornerstone of heritage tourism in North Dakota. Welcome, and thanks for visiting.