What year did Thomas Jefferson complete the Louisiana Purchase?

The Louisiana Purchase was completed in 1803 when the United States acquired approximately 827,000 square miles of territory from France. This significant event effectively doubled the size of the nation and was instrumental in westward expansion. Thomas Jefferson, who was the third President of the United States, played a pivotal role in this transaction, as he was a strong advocate for territorial expansion and believed it would benefit the country both agriculturally and economically. The negotiations culminated in the formal acquisition of this vast territory in April 1803, and by December of that year, the purchase was officially ratified, marking a turning point in American history as the country began to explore and settle the land beyond the Mississippi River.

The other years listed are significant in their own contexts, but they do not align with the actual completion date of the Louisiana Purchase.