U.S. officials, convinced that the British Band was hostile, mobilized a frontier militia and opened fire on a delegation from the Native Americans on May 14, 1832. Black Hawk responded by successfully attacking the militia at the Battle of Stillman's Run. He led his band to a secure location in what is now southern Wisconsin and was pursued by U.S. forces. Meanwhile, other Native Americans conducted raids against forts and colonies largely unprotected with the absence of the militia. Some Ho-Chunk and Potawatomi warriors took part in these raids, although most tribe members tried to avoid the conflict. The Menominee and Dakota tribes, already at odds with the Sauks and Meskwakis, supported the United States.