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It was a Louisiana Purchase Treaty, United States Government General Records, on April 20, 1803, the United States purchased 828,000 square miles of land west of the Mississippi River for 15 million. -
California gold rush, gained influence very quickly by fortune seekers in California, this began after gold was found in Sutter's Mill in early 1848, in 1852 it is said to have peaked than 300.000 people who came to the territory during the gold rush. -
On May 20, 1862, President Abraham Lincoln signed the Homestead Act, it was done to help develop the American West and stimulate economic growth, this law provided 160 acres of federal land to anyone who agreed to farm the land. -
On May 10, 1869, the presidents of the railroads met in Promontory, Utah, and introduced a final ceremonial spike on a railroad line connecting their railroads, the construction of the railroads opened the American West to faster development. -
On October 27, 1873, a farmer from Kalb, Illinois named Joseph submitted a request to the United States office because he had created a clever design that was a fence with sharp spikes. -
On June 25, 1876, Lieutenant Colonel George Armstrong Custer's US Army troops were defeated by Native American forces. -
The Dawes Act was passed by President Grover Cleveland, this law allowed the government to divide tribal lands and only Native Americans who accepted the division of tribal lands were allowed to become US citizens. -
On December 29, 1890, in the last chapters of America's Indian Wars, the American cavalry killed 146 Sioux at Wounded Knee on the Pine Ridge Reservation in South Dakota, when a fight broke out between an Indian and a soldier. American and a shot was fired but it is not yet known from which side it was fired.