Dakota Territory

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Dakota Territory

A territory of the north-central United States organized in 1861 and divided into the states of North Dakota and South Dakota in 1889. The territory included much of present-day Montana until 1864 and Wyoming until 1868.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.