The Black Hawk War was a conflict between the United States and Native Americans led by Black Hawk, a Sauk leader. The war erupted soon after Black Hawk and a group of Sauks, Meskwakis, and Kickapoos, known as the "British Band", crossed the Mississippi River, into the U. S. state of Illinois, from Iowa Indian Territory in April 1832. Black Hawk's motives were ambiguous, but he was apparently hoping to avoid bloodshed while resettling on tribal land that had been ceded to the United States in the disputed 1804 Treaty of St. Louis.

Black Hawk, born Ma-ka-tai-me-she-kia-kiak, (1767-1838) was a band leader and warrior of the Sauk American Indian tribe in what is now the Midwest of the United States. Although he had inherited an important historic medicine bundle from his father, he was not a hereditary civil chief. Black Hawk earned his status as a war chief or captain by his actions: leading raiding and war parties as a young man, and a band of Sauk warriors during the Black Hawk War of 1832.