Why was the US
military sent to
Sioux territory?

The cause of the war was the desire of the US government to obtain ownership of the Black Hills. Gold had been discovered in the Black Hills, settlers began to encroach onto Native American lands, and the Sioux and the Cheyenne refused to cede ownership. The Great Sioux War took place under US Presidents Ulysses S.

Explanation:

The cause of the war was the desire of the US government to obtain ownership of the Black Hills. Gold had been discovered in the Black Hills, settlers began to encroach onto Native American lands, and the Sioux and the Cheyenne refused to cede ownership. ... The Great Sioux War took place under US Presidents Ulysses S.

Explanation:

the 22nd united states congress

the answer is b: an economic crisis throughout the country.