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1803 Northern TX included in the Louisiana Purchase from France.
1804 Louisiana Purchase organized into the "District of Louisiana" and the
Territory of Orleans (Louisiana).
1805 "District of Louisiana" reorganized as Territory of Louisiana.
1812 Territory of Louisiana reorganized into Missouri Territory (aka The Indian Country).
1819 Western borders of Missouri Territory set by treaty with Spain.
1836 "Republic of Texas" declaration of independance from Mexico.
1845 Texas annexed to the Union as 28th state.
Most of area in dispute with Mexico until 1848.
1846 Southern boundry of Texas set at the Rio Grande (Rio Bravo)
River. In dispute with Mexico until 1848.
1848 Treaty with Mexico setting Southern boundry of Texas at the
Rio Grande River. Central Colorado and Eastern New Mexico are claimed by Texas.
1850 Texas borders finalized. Central Colorado and SouthCentral Wyoming added
to the Utah Territory. Eastern New Mexico added to the New Mexico Territory.
With an unorganized piece North of the Texas panhandle. ?added to Missouri
Territory?
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12/1998 M.A.Leonard, Last Update-01/02/2006