May 30, 2001
156 years later, a land divided
1845: Westward expansion of the U.S., and its relations with Mexico, would shape the future of Tohono O'odham traditional lands.
1845-54: With the Gadsden Purchase in 1854, the U.S.-Mexico border was redrawn and O'odham lands were split between countries.
1937: Congress recognizes the Tohono O'odham Nation as a sovereign government and establishes a formal boundary on the U.S. side - approximately 5,500 square miles.
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