Question

What caused the United States to go to war with the Sioux?

O American settlers discovered gold in the Black Hills, where the Sioux reservation was located.
O Americans failed to stop building on the Bozeman Trail, causing the Sioux to retaliate.
O American settlers retaliated when the Sioux tried to expand their territory beyond their reservation.
O American settlers wanted to force the Sioux to adopt American culture.

Answer 1

O American settlers discovered gold in the Black Hills, where the Sioux reservation was located.

Step-by-step explanation:

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