On April 30, 1803, the United States and France
signed the Louisiana Purchase Treaty in Paris, by which France ceded
its Louisiana Territory to the US for $15 million. Review the terms of the Louisiana
On April 30, 1948, the Organization of American
States (OAS) was established in Bogota, Colombia with the
signing of the Charter
of the Organization of American States at the Ninth
International Conference of American States.