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In page Caddo County, Oklahoma:

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Caddo County was organized on August 6, 1901 when the Federal Government allotted the Kiowa, Comanche, and Arapaho reservations and sold the surplus land to white settlers.[1] The reservation land was part of Oklahoma Territory until Oklahoma became a state on November 16, 1907. Part of its land was taken at statehood to form neighboring Grady County. Some additional land was taken in 1911 and also awarded to Grady County.[1]