He resigned because in the face of almost certain impeachment and removal from office
The French looked at America as a place to fish and hunt which other Europeans looked at it as a place to settle. As opposed to settling, like many other Europeans, the French wanted to use America to sell fur and make a profit from it
Jean Baptiste Charbonneau was a Native American-French Canadian explorer, guide, fur trapper trader, and military scout during the Mexican American War.
You can also know him as the son of a Shoshone Indian known as Sacagawea, who guided and helped Lewis and Clark explore the Louisiana Territory.