The French established colonies in North America along the St. Lawrence River valley in Canada in the 16th century. They traded metals, guns, and other goods with the native Algonquian and Iroquois tribes in exchange for furs and fish. This fur trade funded further French colonization but also caused tensions, especially with the Iroquois. The French colony extended from the Gulf of St. Lawrence to the Gulf of Mexico in the 17th century but struggled economically due to selling goods too cheaply and not controlling the native tribes.