A replica of the Mandan-tribe fort where the expedition wintered in North Dakota
The expeditions 1804-05 winter with Mandan tribespeople would prove unexpectedly helpful.
Here they met and hired a French fur trapper, Toussaint Charbonneau. His Shoshone wife, Sacagawea, would prove important to the expedition, by virtue of her skills as a guide and translator and her Indian connections.
Photograph by John Livzey