The following important events in the history of Kansas affected political boundaries, record keeping, and family movements:

1803	The United States acquired Kansas from France as part of the Louisiana Purchase.
1804-1820	United States government expeditions explored the Kansas region, reporting it to be an arid wasteland. The resulting myth of the Great American Desert discouraged early white settlement.
1821	The Santa Fe Trail across Kansas was opened. It served as a wagon road from Missouri to the Southwest until 1880, when the railroad was completed.
1827-1853	The United States Army built forts and roads in Kansas for frontier defense and to protect trade along the Santa Fe Trail.
1830-1854	Kansas was part of Indian Territory, where 20 tribes from the east were relocated. The Indian Territory was closed to white settlement.
1854	The Kansas-Nebraska Act created two territories extending from the Missouri border westward to the tops of the Rocky Mountains and opened the area to white settlement. Migration to Kansas was stimulated by rivalry between North and South over the slavery issue and over the choice of a railroad route to the Pacific.
1861	Kansas, with its present boundaries, was admitted to the Union as a free state.
1861-1865	In the Civil War, over 20,000 of the 30,000 Kansas men of military age served in the Union armed forces. Kansas suffered the highest mortality rate of any state in the Union.
1867	Many of the remaining Indian tribes agreed to leave Kansas and move to Indian Territory in present-day Oklahoma. Indian skirmishes continued in Kansas until 1878.
1870-1890	The post-Civil War boom brought thousands of settlers to build new railroads and to claim land under the Homestead Act.