<Tr> <Td> </Td> <Td> Wyoming Territory split off </Td> <Td> July 25, 1868 </Td> </Tr> <Tr> <Td> </Td> <Td> North Dakota and South Dakota statehood </Td> <Td> November 2, 1889 </Td> </Tr> <P> 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 . </P> <P> 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 . </P>

When did north dakota and south dakota split