Dakota Territory

Wikipedia says: The Territory of Dakota was an organized incorporated territory of the United States that existed from March 2, 1861, until November 2, 1889, when the final extent of the reduced territory was split and admitted to the Union as the states of North and South Dakota.

History

The Dakota Territory consisted of the northernmost part of the land acquired in the Louisiana Purchase in 1803, as well as the southernmost part of Rupert’s Land, which was acquired in 1818 when the boundary was changed to the 49th parallel. The name refers to the Dakota branch of the Sioux tribes which occupied the area at the time. Most of Dakota Territory was formerly part of the Minnesota and Nebraska territories.

When Minnesota became a state in 1858, the leftover area between the Missouri River and Minnesota’s western boundary fell unorganized. When the Yankton Treaty was signed later that year, ceding much of what had been Sioux Indian land to the U.S. Government, early settlers formed a provisional government and unsuccessfully lobbied for United States territory status. Wilmot Wood Brookings was the provisional governor. The cities of Wilmot and Brookings as well as Brookings County are named for him. Three years later, President-elect Abraham Lincoln’s cousin-in-law John Blair Smith Todd personally lobbied for territory status, and the U.S. Congress formally created Dakota Territory. It became an organized territory on March 2, 1861. Upon creation, Dakota Territory included much of present-day Montana and Wyoming as well as all of present-day North Dakota and South Dakota and a small portion of present-day Nebraska. President Lincoln appointed Dakota Territory’s first governor, William Jayne, who was Lincoln’s old friend and neighbor from Springfield, Illinois.

A small patch of land known as “Lost Dakota” existed as a remote exclave of Dakota Territory until it became part of Gallatin County, Montana Territory, in 1873.

All land north of the Keya Paha River (which includes most of Boyd County, Nebraska, and a smaller portion of neighboring Keya Paha County) was originally part of Dakota Territory, but was transferred to Nebraska in 1882.

American Civil War

Dakota Territory was not directly involved in the American Civil War but did raise some troops to defend the settlements following the Dakota War of 1862 which triggered hostilities with the Sioux tribes of Dakota Territory. The Department of the Northwest sent expeditions into Dakota Territory in 1863, 1864 and 1865. It also established forts in Dakota Territory to protect the frontier settlements of the Territory, Iowa and Minnesota and the traffic along the Missouri River.