According to Historians, the French were known to have owned the land west of the Mississippi before the French and Indian War.
France I believe.
the british nation
lands west of the Mississippi that were owned by the French
Spain and France held parts of the land west of the 13 colonies. Spain controlled territories in present-day Florida, Texas, and California, while France had territories in the Mississippi River region.
British
How did the treaty of Paris divide the Americas among the europeans
The French
land west of the Mississippi river
It was a plain land and nobody owned it so Russia got the land.
John Lanford
Spain.