I believe it was July 16, 1790
Colors are often used as symbols. ... A map usually has a legend, or key, that gives the scale of the map and explains what the various symbols represent.
Answer:
There are good reasons to believe that French failure in Santo Domingo (the island of Hispaniola), the imminence of renewed war with Great Britain, and financial stringencies may all have prompted Napoleon in 1803 to offer for sale to the United States the entire Louisiana Territory.
The immigrants that arrive in America in 1800s came here for freedom of religion , as well as jobs and a better "free" life.