The Dawes Act of 1887 regulated land rights on tribal territories within the United States. Named after Senator Henry L. Dawes of Massachusetts, it authorized the President of the United States to subdivide Native American tribal communal landholdings into allotments for Native American heads of families and individuals. This would convert traditional systems of land tenure into a government-imposed system of private property by forcing Native Americans to "assume a capitalist and proprietary relationship with property" that did not previously exist in their cultures. The act allowed tribes the option to sell the lands that remained after allotment to the federal government. Before private property could be dispensed, the government had to determine which Indians were eligible for allotments, which propelled an official search for a federal definition of "Indian-ness".

Henry Moore Teller was an American politician from Colorado, serving as a U.S. senator between 1876–1882 and 1885–1909, also serving as Secretary of the Interior between 1882 and 1885. He strongly opposed the Dawes Act, intended to break up communal Native American lands and force assimilation of the people, accurately stating that it was directed at forcing the Indians to give up their land so that it could be sold to white settlers. Among his most prominent achievements was authoring the Teller Amendment which definitively stated that, following the Spanish–American War, the United States would not annex Cuba, rather that the purpose of their involvement would be to help it gain independence from Spain.