He led his band during the most tumultuous period in their contemporary history when they were forcibly removed from their ancestral lands in the Wallowa Valley by the United States federal government and forced to move northeast, onto the significantly reduced reservation in Lapwai, Idaho Territory. A series of events which culminated in episodes of violence led those Nez Perce who resisted removal including Joseph's band and an allied band of the Palouse tribe to take flight to attempt to reach political asylum, ultimately with the Sioux chief Sitting Bull in Canada.