Question: What era was a well-known American fur trader and politician alive, who's mother was Jane Fisher, who married Joe Rolette, Sr, that lasted from the Louisiana Purchase in 1803 to Minnesota's achieving statehood in 1858?
Sentence (from "Territorial era of Minnesota"): Though there was a long history of European presence in the area before 19th century, it was during the 19th century that the United States began to establish a firm presence in what would become Minnesota.
Relevant evidence: No