It was Oklahoma.
Oklahoma
The answer is Oklahoma*
Though not always considered a Southwest state, the eastern half of Oklahoma was known as Indian Territory from 1834 to 1907, when it was joined with the Oklahoma Territory.
Oklahoma
Oklahoma.
They moved to Indian Territory in eastern selections of present day Oklahoma.
The Indian Territory included present-day Oklahoma N and E of the Red River, as well as Kansas and Nebraska; the lands were delimited in 1854, however, by the creation of the Kansas and Nebraska territories. Tribes other than the original five also moved there, but each tribe maintained its own government.
Oklahoma
The original territory set aside for Native Americans was the present-day state of Oklahoma. Later, a smaller part of present-day Oklahoma was allocated for the Native Americans.
All of the United States was "Indian territory ." Millions of Native Americans lived in North America when the Europeans arrived. They were killed, removed from ancestral lands, and discriminated against until many had been forced onto reservations.
The present day states of Oregon, Washington, and Idaho were Oregon Territory.