The Louisiana Territory was:
purchased from Napoleon Bonaparte
a,
o b. purchased from the British monarch
Oc.
acquired through war with Spain
acquired through treaties with the region's indigenous peoples
Od.
O e.
acquired through war with Britain
The Louisiana Purchase (1803) was a land deal between the United States and France, in which the U.S. acquired approximately 827,000 square miles of land west of the Mississippi River for $15 million.