Final answer:
The situation in the Black Hills and at Sand Creek involved the discovery of gold and settlers taking over indigenous lands, leading to conflict and violence.
Step-by-step explanation:
The situation in the Black Hills was similar to the situation at Sand Creek in Colorado in that the discovery of gold brought in settlers who took over indigenous lands. In both instances, the indigenous tribes resisted the encroachment on their lands, which led to conflicts and violence. At Sand Creek, the Cheyenne were massacred despite attempts to peacefully resolve issues, and in the Black Hills, the Lakota protested the invasion and desecration of their sacred land, leading to confrontations and eventually to the government forcing them to sell the land at a price it deemed fair.