Angered by the loss of his birthplace, in prior disputed treaties, Black Hawk led a number of incursions across the Mississippi River beginning in 1830. Each time, he was persuaded to return west without bloodshed. In April 1832, encouraged by promises of alliances with other tribes and the British, he again moved his "British Band," of around 1,000 warriors and civilians, into Illinois. Finding no allies, he attempted to return to Iowa, but ensuing events led to the Battle of Stillman's Run. A number of other engagements followed, and the state militias of Wisconsin and Illinois were mobilized to hunt down Black Hawk's band. The conflict became known as the Black Hawk War.