After the Black Hawk War, General Winfield Scott negotiated the Black Hawk Purchase. At least that is the name a lot of history books gave it. The Indians relinquished land and received money. It could have been called something else, however.
My vote would be for “The we defeated Black Hawk, now we will take your land, your river, and your lead mines, even if you didn’t fight against us and maybe even fought on our side treaty” That is a longer name, but probably more accurate.
This is apparently the first treaty that Poweshiek signed. He really had no choice. This treaty ceded all the land from the Mississippi River to about fifty miles to the west of it, with the exception of a small portion called “Keokuk’s Reserve.” The remaining Sac and Fox Indians settled in little villages along the Iowa River. Keokuk already had a village about a dozen miles upstream from the Mississippi—probably about where the village of Wappelo is now. Poweshiek moved the farthest upstream, and settled in the area that is now Iowa City. Wapello and Appanose had villages in between.
The cycle of seasonal migration, with summer villages along the Mississippi was now broken.