Sod houses were cleaner than other buildings.
There were few trees that could be used for wood.
Houses made from wood were too cold in the winters.
The railroads paid people to live in sod houses.
Low crop prices
Many farmers moved to the Great Plains
The Indians started moving to the reservations.
Ranchers started moving cattle to the "cow towns".
The mining boom in the West ended.
Transportation by railroad
Special areas of farmland given to Homesteaders
The path of the buffalo migration on the Great Plains
Trips on which cowhands moved large numbers of cows to the railroads
The use of barbed wire.
The steel plow.
Most people lost all of their money.
People moved away from mining areas.
Gold, silver, and copper mines were closed.
There was quick economic growth.
The range wars destroyed all the buildings in the town.
The mines ran out of gold, silver, or copper.
The railroads moved away.
The vaqueros ordered everyone to leave town.
The U.S. Army
The Union Army
To open a new railroad through the Black Hills
To protect cowhands on long drives across the Sioux reservation
To help miners in a boomtown
To take back the land the government had given the Sioux
Because the Nez Perces were living on land that contained gold
To punish them for defeating Custer and his soldiers
Because the Nez Perces were trying to escape to Canada
To stop them from going to war with the Sioux