We're a few days late on this, but only a few. On 8 January 1815, American forces, largely militia, led by Andrew Jackson defeated elements of the most powerful military in the world.
It's a more interesting story than the famous song suggests:
That makes it sound like Jackson won in a walk, against an inept opponent. In fact the British forces were disciplined and supplied with artillery and rockets, and the fighting lasted half a month. It is only the remarkable disparity in casualties that make it seem, with hindsight, like an easy victory.