Mandan
The Mandan were a Siouan-speaking people who lived in fortified earth-lodge villages along the Missouri River in present-day central North Dakota, and they served as the epicenter of a vast intertribal trade network linking the northern Plains, Rocky Mountains, and Great Lakes. Lewis and Clark arrived at the Mandan villages in late October 1804 and built Fort Mandan nearby, spending the winter of 1804–1805 in what became the expedition's longest and most productive encampment. The Mandan were gracious hosts, sophisticated diplomats, and experienced traders whose knowledge of regional geography, intertribal politics, and western territories was indispensable to the expedition's planning. Their agricultural economy—centered on corn, beans, squash, and sunflowers—supported a complex ceremonial life including the Okipa ceremony, though their population had been catastrophically reduced by smallpox in 1781 and would be nearly annihilated by the epidemic of 1837.
Biography
The Mandan were a sedentary agricultural people living in earth-lodge villages along the Missouri River in present-day North Dakota. The expedition built Fort Mandan near their villages and spent the winter of 1804-1805 among them — the longest the Corps stayed with any single people.
The Mandan villages were a great trade center of the Northern Plains, where goods from as far as the Pacific coast and Hudson Bay were exchanged. Their population was approximately 4,500 when the expedition arrived, though they had been severely reduced by earlier smallpox epidemics.
The Mandan provided food, shelter, and critical geographic information about the route ahead. Their detailed maps of the upper Missouri and its tributaries proved remarkably accurate. It was at the Mandan villages that Charbonneau and Sacagawea joined the expedition.
Chief Sheheke (Big White) later traveled to Washington, D.C. at the expedition’s invitation — a journey that would become an ordeal lasting three years due to Arikara hostility that prevented his return upriver. The Mandan suffered catastrophically from a smallpox epidemic in 1837 that reduced their population from approximately 1,600 to just 125 people.
