Alexander the Great built one of the largest empires in history—stretching from Greece to Egypt, across Persia, and into India—more than 5,000 miles across three continents.

And he did it in just eleven years, without losing a single battle. His forces crossed deserts, scaled mountain ranges, and faced war elephants. His secret? A mix of bold tactics, rapid movement, and a knack for turning former enemies into allies.

At its peak, his empire was larger than the Roman Empire ever was at its height—and he achieved it all before the age of 33.