At the point when Sioux arrangement lands were overwhelmed with gold seekers, the U.S. just looked to change as opposed to respect the 1851 bargain. Pressures along the Bozeman Trail kept on developing. At that point, in June of 1866, the U.S. held a gathering at Fort Laramie with different Lakota groups.

The legislature guaranteed numerous endowments and advantages to the Sioux and overlooked the question of the administration's enthusiasm—to arrange another bargain which would cut off the Powder River territory and the Bozeman Trail to the Indians so as to protect proceeded with gold supplies and displacement into Montana. Amidst the bargain talks, a military man educated a portion of the Indian arbitrators he had requests to manufacture fortresses along the Bozeman Trail to ensure pilgrims moving into Montana.

The Sioux were shocked, as it was in coordinate infringement of the 1851 Treaty and had not been said in the gathering gatherings. In this manner the settlement talks finished unexpectedly. Red Cloud conveyed a discourse about white double-crossing and bad form and drove the Sioux assignment north vowing to battle all who attacked their domain as set down in the 1851 Treaty.

The inconveniences in 1866– 1868 in the Powder River district, regularly called "Red Cloud's War," brought about a reasonable triumph for the Lakota. The Lakota had denied the Bozeman Trail to for all intents and purposes all foreigner travel. Armed force supply trains needed to battle their way through, and fighters were suppressed in their strongholds. The Indians had little need to arrange a bargain thus overlooked all administration suggestions to do as such.

At long last in 1868 the troopers surrendered their fortifications along the Bozeman Trail as an approach to restart settlement arrangements. At this point the U.S. government was determined to binding the Sioux to banished an area however first it required an arrangement.