His government intended to take over the copper mines of the Sioux Indians in the interests of France .
In 1700 , Le Sueur was sent to the upper Mississippi with 20 men to establish a fort in the Sioux country .
Le Sueur 's government intended to take over the copper mines of the Sioux Indians in the interests of France .
In 1700 , Le Sueur was sent to the upper Mississippi with 20 men to establish a fort in the Sioux country .