The Dakota/Ojibwe battles tend to be glossed over in just about any history text. If there is a detailed account, I have yet to learn of it, but perhaps mentioning that here will lead to more information.

Generally the summary goes like this:

The Dakota (or Sioux) are thought to be descendants of the Woodland Indians and were the dominant society in the Duluth area during the 1600s, when the Anishinaabe-Ojibwe (Chippewa) migrated from the east along the Great Lakes.

Competition in trading with European settlers led to intertribal conflict.  With the help of guns acquired in the fur trade, the Ojibwe pushed the Dakota south and west during battles that extended over a 100-year period.

By the end of the 1700s, the Ojibwe controlled nearly all of Minnesota and all of Lake Superior's shores.

That's about all I've ever read, other than the Legend of Spirit Island.

Thanks Waferdog, that's a much more nuanced and interesting read. Library, here I come.