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.
Montgomery County, Kansas
When Kansas was admitted to the Union as a state in 1861, the Osage Indian reservation occupied a large tract of land near the southern border. The reservation had been established in 1825. After the Civil War ended, the Osage lands were coveted as the largest and last reserve of good land in the eastern part of the state. As early as 1866, the Osages were forced to cede tracts at the eastern and northern edges of the reservation. This treaty conceded white settlement on land in the eastern part of what is now Montgomery County.