Louisiana Purchase was the document that made most of the area along the Mississippi the property of the United States. It was bought in 1803, and it used to be owned by France.
<span>Louisiana Purchase.
Bought by the United States in 1803, the Louisiana Purchase was a large territory owned by France that covers approximately 828,000 square miles of land.</span>
This is because, the days of autocracy is over and there is a new era of democracy where each and everyone is allowed to speak out his or her opinion when it comes building up a government