The territory of Louisiana was purchased and acquired by the United States of America from France in "1803".
EXPLANATION:
A total sum of fifteen million dollars was paid by the government of U.S for the purchase of Louisiana territorty. The "kingdom of France" ruled and control Louisiana from "1699" until it was lost to Spain during the war in 1762.
The French again gained control of the territory during the Napoleon era in 1800. The fear of war with the British prompted Napoleon to consider selling the "territory of Louisiana" to the United States.
