Alexander the Great conquered the largest empire in the world up to that time in just 10 years, spreading Greek culture throughout Asia and Europe. Born in Macedonia and tutored by Aristotle, Alexander took the throne at age 20 after his father Philip was assassinated. He then spent a decade expanding his empire, defeating King Darius III of Persia in multiple battles to take control of Persia. Alexander pushed his armies all the way to India before his troops refused to go further, after which he began the long journey back and died in Babylon at age 33, leaving his empire divided among his generals after his death.