Fort Crawford

In 1826, floodwater forced the U.S. troops at Fort Crawford to evacuate Prairie du Chien. The post had been built a decade earlier at the junction of the Mississippi and Wisconsin River routes, a place long contested by Native nations and European powers. The flood exposed the weakness of the first fort’s location and led the Army to rebuild on higher ground.

The first wooden fort had been established in 1816, on the site of the earlier Fort Shelby. Its soldiers enforced federal rules on the fur trade and sought to maintain U.S. authority as settlers entered the region. In 1825, thousands of delegates from Dakota, Ho-Chunk, Sac, Meskwaki, Ojibwa, Ottawa, Potawatomi, Menominee, and Iowa nations gathered nearby for the Treaty of Prairie du Chien, which set territorial boundaries. The fort stood within a landscape whose political future was being shaped through both diplomacy and military pressure.