Where was the most important battle of the war of 1812

The Battle of New Orleans was the final major battle waged in the War of 1812, and was fought between January 8th and January 18th in 1815. The American combatants were led by Major General Andrew Jackson against the British forces led by Admiral Alexander Cochrane.

Explanation:

On January 8, 1815, unaware that peace had been concluded, British forces mounted a major attack in the Battle of New Orleans, only to meet with defeat at the hands of future U.S. president Andrew Jackson's army. News of the battle boosted sagging U.S. morale and left Americans with the taste of victory.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;