Why did Napoleon decide to sell such a large piece of US?

Answer 1

The Louisiana purchase, for 60,000,000 francs, or $11,250,000. The purchase included Arkansas, Missouri, Iowa, Oklahoma, Kansas, Nebraska, parts of Minnesota that were west of the Mississippi River, most of North Dakota, nearly all of South Dakota, northeastern New Mexico, the portions of Montana, Wyoming, and Colorado east of the Continental Divide, and Louisiana west of the Mississippi River, including the city of New Orleans.

Answer 2

Napoleon decided to sell a large piece of the US, known as the Louisiana Territory, primarily for economic and political reasons. The French colony in Haiti had failed, and Napoleon needed the funds to finance his military campaigns in Europe. Furthermore, he feared that the British might seize the territory, so selling it to the US ensured its defense against the British and strengthened the young American nation as a counterbalance to British influence in North America.