Question

in the 1870s, when gold was discovered in the black hills, the federal government first tried to buy the territory from the american indians. restrict all sioux indians to their reservation. call on the us military to resolve the claims issue. sign a new treaty with the areas tribal chiefs.

Explanation:

When gold was discovered in the Black Hills in the 1870s, the federal government first tried to restrict all Sioux Indians to their reservation as the Black - Hills were part of Sioux land. This was an attempt to gain access to the gold - rich territory while dealing with the presence of the Indians.

Answer:

restrict all Sioux Indians to their reservation.