New Orleans was a very important port, and the Mississippi River helped settlers get their goods to eastern markets. Napoleon wanted to send troops to Louisiana, but hopes were crushed for a North American French Empire. Napolean sold Louisiana to the USA for $15 million. Jefferson was alarmed because he didn't see it coming. On April 30, 1803 the Louisiana Purchase Treaty was signed. Pros: More land and more dominance of America. Cons: America in debt, and Natives everywhere.