Which significant battle enabled Andrew Jackson to become the President of the USA? Considering his leadership and contribution to this war he was catapulted to the White House.
This battle was the battle of New Orleans, early in 1815.
The peace treaty for the War of 1812 had been signed in Europe, but the Americans didn't yet know it (in the days before telecommunications). Nor did the British attackers headed to Louisiana.
Jackson adopted a fortified position and let the British attack over rough terrain. The result was a lopsided American victory, about 2,000 British killed and wounded (including their general), versus 20 American casualties.
This "sealed" the peace after heavy American defeats in 1814 (when the British had captured and burned Washington D.C.), because the last battle was an American victory. The British weren't about to overturn the peace and suffer another defeat at the hands of a general like Jackson. New Orleans made clear that Jackson was one of the greatest generals in American history, and paved the way for his Presidency.