Harrison hoped his preemptive strike would subdue Tecumseh's confederacy, but a wave of frontier violence erupted after the battle. Indians, many who had fought at Tippecanoe, sought revenge, killing as many as 46 Americans. Tecumseh sought to restrain warriors from premature action while preparing the confederacy for future hostilities. By the time the United States declared war on Great Britain in June 1812, as many as 800 warriors had gathered around the rebuilt Prophetstown. Tecumseh's Indian allies throughout the Northwest Territory numbered around 3,500 warriors.