The Treaty of Ghent was signed after the battle but before news reached the U.S.

The Treaty of Ghent was signed on December 24, 1814, ending the War of 1812, but the news of the treaty had not yet reached the United States by the time of the Battle of New Orleans on January 8, 1815. Due to the slow communication methods of the era, the battle took place after the peace agreement had already been concluded in Europe. However, the victory at New Orleans was significant in boosting American morale and solidifying Andrew Jackson's reputation as a national hero. The battle gave the impression that the U.S. had decisively won the war, even though the treaty had already been negotiated.