St. Croix River (Wisconsin–Minnesota)
The first Europeans to arrive in the area were Sieur du Lhut and his men in the fall and winter of 1679-1680. For the next eighty years the area was mainly under French influence. The fur trade grew throughout the first half of the eighteenth century. Beaver pelts were one of the main products.  French trade in the upper valley was dominated by the Ojibwe. They were tied to Lake Superior traders. In the lower valley the Dakota assisted in trading with merchants based out of St. Louis. After the end of the French and Indian War in 1763, British traders entered the area. They grew in numbers and influence with the help of the powerful North West Company.