The park is home to the replica Mandan On-A-Slant Indian Village and reconstructed military buildings including the Custer House.

Two hundred years later, an outbreak of smallpox significantly decreased the Mandan population and the survivors resettled to the north.

[4] In June 1872, at the same location where the Mandan tribe had established their village, a military post named Fort McKeen was built by two companies of the 6th US Infantry under Lt. Col. Daniel Huston, Jr. (1824-1884) opposite Bismarck, Dakota Territory.

The first post commander of the expanded fort was Lieutenant Colonel George A. Custer, who held the position until his death in 1876.

[10] In 1876, the Army departed from here as part of the Great Sioux War of 1876, resulting in Custer's defeat at the Little Bighorn, where they were to push the non-treaty Indians back to their particular reservations.

They also reconstructed military blockhouses and placed cornerstones to mark where fort buildings once stood, as well as replicating Mandan earthen lodges.

A reproduction of Custer's house was built in the park in 1989, in time for the state of North Dakota's centennial celebration.

The top center of the earth lodge contained a hole to let out smoke from the fire pit and to let in sunlight.

[19] Fort Lincoln Park offers living history tours of the Custer House every half-hour.

The tour is roughly thirty minutes long and takes you back to the year 1875 when Custer and his wife were living at Fort Abraham Lincoln.

Interpretive tours of On-A-Slant Village and the earth lodges, in which the guides give a basic introduction to Mandan culture, are offered every half-hour and are about thirty minutes long.