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In the 1868 US-Sioux Treaty of Fort Laramie the US mistakenly included all Ponca lands in present-day Nebraska in the Great Sioux Reservation of present-day South Dakota.

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In the 1868 US-Sioux Treaty of Fort Laramie the US mistakenly included all Ponca lands in the Great Sioux Reservation.

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Promote Demote Fragment Fix

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