Kansas Territory
The Territory of Kansas was an organized incorporated territory of the United States that existed from May 30, 1854, until January 29, 1861, when the eastern portion of the territory was admitted to the Union as the state of Kansas.
Department of Kansas
The first "Department of Kansas" was created on November 9, 1861 from the Western Department. It included Kansas, Nebraska Territory, Colorado Territory, Dakota Territory and the Indian Territory (present day Oklahoma). On March 11, 1862 the department was absorbed into the Department of the Mississippi. Brigadier General David Hunter was the sole commander during this period. During this interlude a District of Kansas existed under the command of Brigadier General James W. Denver from March 19-April 10, 1862.