Answer:
The Louisiana Purchase was the deal when, under President Thomas Jefferson in 1803, the United States bought land from France for 15,000,000 dollars. With the purchase, America doubled its previous territory, consolidating its expansion towards the west of the continent and becoming the main power of the same in territorial terms. In addition, this purchase implied the loss of a direct competitor such as France in relation to territorial expansionism in the region.
The reasons for which France sold the territory were that, after the loss of Haiti and the resumption of the war against Great Britain, it was not profitable to keep Louisiana under its sovereignty, since it implied great economic losses. Therefore, Napoleon Bonaparte offered the United States to buy the land, partly to improve finances, but also to avoid an eventual British conquest of the territory.