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1851	First Treaty of Fort Laramie.
1862	Homestead Act. Great Sioux Uprising (Santee Uprising).
1864	Sand Creek massacre.
1867	Treaty of Medicine Lodge.
1868	Washita massacre. Second Treaty of Fort Laramie.
1869	First transcontinental railroad completed.
1870s	Hunters begin to decimate bison herds.
1873	“Big Bonanza” discovered on Comstock Lode.
1874	Discovery of gold in Black Hills.
1876	Battle of the Little Big Horn.
1877	Chief Joseph surrenders.
1879	Carlisle Indian School opens. Exodusters move to Kansas.
1881	Sitting Bull surrenders.
1882	Chinese Exclusion Act.
1886	Geronimo surrenders.
1886–1887	Severe blizzards decimate cattle.
1887	Dawes Allotment Act.
1889	Rise of Ghost Dance. Two million acres in Oklahoma opened for settlement.
1890	Sitting Bull killed. Massacre at Wounded Knee, South Dakota.
1893	Last land rush in Oklahoma Territory. Frederick Jackson Turner presents “frontier thesis.”