Designation on old U.S. maps Crossword Clue

 The answer to the crossword clue "Designation on old U.S. maps" is INDIANTERRITORY.

Indian Territory was a U.S. territory that existed from 1834 to 1907. It was created as a homeland for Native Americans who had been displaced from their traditional lands in the eastern United States. The territory was located in what is now present-day Oklahoma.

Indian Territory was abolished in 1907 when Oklahoma became a state. The territory's lands were divided among the Five Civilized Tribes (the Cherokee, Chickasaw, Choctaw, Creek, and Seminole) and the white settlers who had moved into the territory during the late 19th century.

The clue "Designation on old U.S. maps" is a reference to the fact that Indian Territory was a designated territory on U.S. maps from 1834 to 1907.