Which two union states are farthest west

Review the territory. all land from the bighorn mountains down to south dakota territory. what happened to this territory as a result of the treaty of fort laramie in 1868? it was confiscated by the us government, as a consequence for the battle of the little bighorn. it was given to the us government by the lakota sioux, who got reservation lands in exchange. it was gifted by the us government to the lakota sioux, who viewed it as a sacred place. it was allocated for lakota sioux to settle, but the us government maintained mining rights.

This is the belief that a nation must develop and maintain a strong military force in order to pursue and defend its national interests.

Could anything have been done through compromise to stop it, or did it have to happen?