In June 1814, the U.S. Army garrison at Fort Shelby in Prairie du Chien, Wisconsin, faced threats from British and Indian forces and called for reinforcements and supplies. In response, Governor William Clark of Missouri organized a military expedition to relieve the besieged garrison. This expedition represented an attempt by American forces to maintain their position in the Upper Mississippi River region during the War of 1812.
Lieutenant John Campbell led the expedition, which departed from Cape au Gris on July 4, 1814, with three fortified barges, or keel boats, each equipped with a cabin and sails. The expedition consisted of 33 regular soldiers from the 1st and 7th Infantry regiments and 65 rangers, including some Frenchmen from Cahokia. On July 19, Campbell's force was ambushed by British-allied Sauk, Meskwaki, and Kickapoo warriors at Rock Island Rapids, also known as the Battle of Campbell Island.
The ambush resulted in an American defeat. Following this engagement, the U.S. garrison at Prairie du Chien fell to the British. In an effort to recapture the fort, another expedition was subsequently mounted but was also ambushed during the Battle of Credit Island, forcing American forces to retreat southward. These successive defeats represented a significant setback for American military operations in the region during the War of 1812.
The early republic period saw the United States move from the weak Articles of Confederation to the federal Constitution ratified in 1788, with the Bill of Rights added in 1791. George Washington served two terms as president (1789–1797), establishing precedents for executive authority, and the federal capital moved permanently to Washington D.C. in 1800. The Louisiana Purchase (1803) doubled the nation's territory for roughly $15 million, opening vast trans-Mississippi lands to American expansion. The War of 1812 against Britain ended inconclusively but produced a surge of American national identity and eliminated most British support for Indigenous resistance east of the Mississippi. The Northwest Indian Wars (1785–1795) and the Creek War (1813–1814) broke Indigenous confederacies that had resisted US expansion. The Missouri Compromise of 1820 temporarily balanced slave and free states as the nation expanded westward, but embedded the contradiction of slavery in every subsequent territorial debate.
Several US killed and wounded; US withdrew
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