The conflict between the American Indians (aka Native Americans) and European (White) settlers goes back to the original landing of Europeans at Roanoke Island and Jamestown. Just about every time the Indians tried to flip a deal, that deal was broken, most often by the Whites. Sometimes it was by design. Other times, it was not from a formal governmental policy but instead from the fact that White settlers just ignored the treaties. When the British won the French and Indian War, a policy was implemented that prohibited settlements west of the Appalachians. Settlers went into the Ohio Valley anyway. Whether it be British or later American governments, they either had no ability or no desire to enforce the treaties. Many times, it was a combination of government policy, government indifference and settler behaviour that resulted in the fracture of any given treaty. In the end, the result was the same: the Indians got screwed.
In 1851, the Dakota in what is now the northern plains states figured that their only chance for survival was to make peace. On July 23, 1851 the Treaty of Traverse des Sioux called for two bands of the Dakota to cede a big chunk of the southwestern part of the Minnesota Territory (including present day parts of South Dakota and Iowa) to the United States for $1.665 Million. A few months later, two more bands of Dakota gave up a big chunk of the southeastern part of the territory for $1.41 Million. That’s a lot of money today and was an enormous sum back then. Remember, Alaska was purchased for $7.2 Million and about 1/3 of the continental US was had for $15 Million with the Louisiana Purchase. The French and the Russians accepted a check from the US Treasury but the Indians were basically given a promise in the form of future payments and annuities. Hmmm….guess what happened?