Why did Andrew Jackson victory surprise the world?

Answer 1

I presume you are asking about his victory at New Orleans in which he lost 13 men while the British had some 2000 causalities, including three senior generals. He had an army with little training, mostly militia men who had recently volunteered into the military. The British army were all professional soldiers and marines, fresh from their defeat of Napolean , armed with the latest weapons. It was the greatest land battle in US history.