The Korean War was caused because North Korea, China, and the Soviet Union all wanted the Korean Peninsula to be a communist area.
By selling Louisiana to the U.S. in 1803, Napoleon obviated the need to defend it against the British, and he may have hoped that the need of the U.S. to defend the territory (against the British) might have brought America back to its alliance with France.
Hope this helps
The Thanksgiving holiday has many myths associated with it because Thanksgiving is an invented tradition. It is part New England puritan, which makes it a religious Thanksgiving