From November 17, 1862, the Department was divided into four districts for a short time. The First District was composed of the Iowa and Dakota Territory, the Second was the vicinity of Fort Snelling, the Third was the vicinity of Fort Ripley and the Fourth was the vicinity of Fort Abercrombie. These last three districts were merged into the District of Minnesota on November 23, 1862. The First District remained until June 1, 1863, when the Dakota Territory was merged into the District of Dakota and Iowa into the District of Iowa. Wisconsin was also a District. The Montana Territory was added to the Department on May 26, 1864. The Department of the Northwest, Department of Kansas, and Department of Missouri were combined to form the Division of Missouri on January 30, 1865. On February 17, 1865, the Montana and Dakota Territories west of 110 degrees west longitude were also attached with Major General Pope, who was elevated to commander of the Division.
The Department of the Northwest through the remainder of the Civil War consisted of the Districts of Wisconsin (under Brig. Gen. Thomas A. Davies), Minnesota (Brig. Gen. Henry H. Sibley) and Iowa (Brig. Gen. Alfred Sully). The Department of the Northwest was merged with the Department of the Missouri on June 27, 1865. In 1866 most of the Department
of the Northwest was reorganized as the Department of Dakota.
Camp McClellan (1861–1865), Davenport. Located on the riverfront at McClellan Park.
Camp Kearny (1863–1865), Davenport It was a prison stockade for Sioux Indians captured after the Sioux Uprising in Minnesota. Located adjacent to Camp McClellan.
September 28 - November 3, Col. Sibley, with questionable authority and jurisdiction, forms a military tribunal to try 393 Dakota prisoners for "murder and other outrages." 323 accused were convicted and 303 sentenced to death.[4]
December 26, 38 Dakota prisoners hanged in Mankato, Minnesota. President Abraham Lincoln personally reversed the sentences for all but these, at least one of whom was a victim of mistaken identity.[5]
July 25, Sully's troops arrived at Fort Pierre missing the rendezvous with Sibley at Long Lake. Sully was forced to wait two more weeks for his steamboats, delayed by extreme low water in the Missouri River caused by a drought.
July 31, With no sign of Sully at Long Lake and his horses worn down from the campaign, Sibley decides to abandon the operation and march back to Minnesota.
Mid-August, Sully, loaded the available supplies and 23 days of rations onto borrowed wagons and marched overland toward Devils Lake.
Late August, Sully's command reached rendezvous site at Long Lake. Sully knowing he had missed Sibley, turned southeast to attack Dakota that had returned to the east side of the Missouri River to hunt buffalo following the departure of Sibley.
March 28, District of the Plains formed, to consisting of the Districts of Utah, Colorado, and Nebraska, with Brig. Gen. Patrick E. Connor, assigned to its command.
Late Spring, Santee Sioux raid into Minnesota led by Jack Campbell killed 5 members of the Jewett family near Mankato, the last civilians killed in the Indian Wars in Minnesota. Campbell, drunk, was soon caught and hung. Santee Scouts working for the Army killed the remainder of the band soon after. Sully's force was diverted to attack hostiles, thought to be the source of the raid, near Devils Lake.
August 25, Sully returns to Fort Rice, which drives off a Sioux force that had been attacking the Fort.
September 13, Sully returns to Fort Sully ending the campaign.
November 11, After being kidnapped in Canada and subjected to a summary military trial, Dakotas Shakpe and Medicine Bottle are hanged at Fort Snelling.[6]
^Neighbors to the Rescue: Wisconsin and Iowa, Minnesota History Winter 1979, Edward Noyes, Minnesota Historical Society, St Paul, MN, p. 312 [1]Archived 2022-07-16 at the Wayback Machine
^ abDavid Stephen Heidler, Jeanne T. Heidler, David J. Coles, Encyclopedia of the American Civil War: A Political, Social, and Military History, W. W. Norton & Company, New York, 2000, p.590
^John H. Eicher, David J. Eicher, Civil War High Commands, Stanford University Press, Stanford, California, 2001, p.839