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 Laurens Dawes was an attorney and politician, a Republican United States Senator and United States Representative from Massachusetts. He is notable for the Dawes Act (1887), which was intended to stimulate the assimilation of Native Americans by ending the tribal government and control of communal lands. Especially directed at the tribes in Indian Territory, it provided for the allotment of tribal lands to individual households of tribal members, and for their being granted United States citizenship. This also made them subject to state and federal taxes. In addition, extinguishing tribal land claims in this territory later enabled the admission of Oklahoma as a state in 1907.