The impact of the War of 1812 on U.S. expansion was significant, fostering a sense of nationalism and paving the way for westward expansion. The conflict, fought primarily against Great Britain from 1812 to 1815, ended in a stalemate but boosted American pride after victories, especially in the Battle of New Orleans. The war also weakened Native American resistance in the Northwest Territory, leading to further encroachment on their lands by American settlers. Consequently, it facilitated the idea of Manifest Destiny, encouraging the belief that the U.S. was destined to expand across the continent, shaping the nation’s trajectory in the following decades.