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A region and former territory of the south-central United States, mainly in present-day Oklahoma. It was set aside by the government as a homeland for forcibly displaced Native Americans in 1834. The western section was opened to general settlement in 1889 and became part of the Oklahoma Territory in 1890. The two territories were merged in 1907 to form the state of Oklahoma.
(Historical Terms) the territory established in the early 19th century in present-day Oklahoma, where Indians were forced to settle by the US government. The last remnant was integrated into the new state of Oklahoma in 1907
a former territory of the U.S.: now in E Oklahoma. ab. 31,000 sq. mi. (80,000 sq. km).
Roughly the Eastern half of what is now the state of Oklahoma. In 1907, Oklahoma Territory and Indian Territory were combined to form the state of Oklahoma. Indian Territory was mainly occupied by the five Civilized Tribes, comprised of the Cherokee Nation, the Chickasaw Nation, the Choctaw Nation, the Creek Nation, and the Seminole Nation.