Fort Abraham Lincoln (historical)

Fort Abraham Lincoln is a late‑19th‑century U.S. Army post on the Missouri River near present‑day Mandan, North Dakota, notable as the headquarters of Lt. Col. George Armstrong Custer and the 7th Cavalry before the 1876 campaign. The site is interpreted today as a historical park with reconstructions and museum displays.

Interpretive highlights on site include a reconstructed officer’s residence commonly known as the Custer House, a reconstructed Mandan earthlodge village called On‑A‑Slant, and exhibits in the visitor centre that present archaeology and artefacts from the fort. The park offers trails and seasonal living‑history programming.

The post functioned as an active army installation in the late 19th century and its built footprint and archaeological remains inform the reconstructions and displays. The site is maintained for public education and historic interpretation.

Fort Abraham Lincoln sits in central North Dakota beside the Missouri River near Mandan and Bismarck, within the state park that preserves the historic grounds and surrounding riverine landscape.

• Custer association: Serves as the historical site associated with Lt. Col. George Armstrong Custer and the 7th Cavalry prior to the 1876 campaign against the Sioux and Cheyenne.
• Reconstructions and programming: The state park preserves both military structures and reconstructions of Native American earthlodges, with trails and living‑history programming seasonally available.

What to See #

• Custer House reconstruction: A reconstructed officer's residence known as the Custer House, rebuilt from archaeological evidence to illustrate army domestic life at the post.
• On‑A‑Slant Mandan village: A reconstructed Mandan earthlodge village known as On‑A‑Slant that interprets the precontact and 19th‑century village life of the Mandan people who lived on the adjacent river plain.
• Visitor centre and museum: Park visitor centre and museum exhibits that present artefacts, interpretive panels and archaeological finds from the fort and surrounding area.