The battle occurred in the aftermath of the Battle of Wisconsin Heights, as Black Hawk's band fled the pursuing militia. The militia caught up with them on the eastern bank of the Mississippi River, a few miles downstream from the mouth of the Bad Axe River. The battle that followed was very one-sided: historians have called it a massacre since the 1850s. The fighting took place over two days, with the steamboat Warrior present on both days. By the second day, Black Hawk and most of the Native American leaders had fled, though many of the band stayed behind. The victory for the United States was decisive and the end of the war allowed much of Illinois and present-day Wisconsin to be opened for further settlement.