It had long been a dream of the Greek people to defeat the Persian empire, but no one had been able to do it. No one, that is, until Alexander.
Alexander was the son of King Philip II of Macedon. After Philip was assassinated, Alexander became the king of Macedon. He was able to unite all of the Greeks under the goal of conquering Persia, and they voted for him to be the leader of all Greek forces.
The Greek army was smaller than Persia’s, but Alexander believed that they could win the fight by having better trained soldiers and better tactics, and he turned out to be right. He was able to defeat the Persians and take over the whole Persian empire.
He kept going and might have taken over India too, but his men were tired and wanted to turn around, so he stopped. And during all of this, he never lost a battle.
At the age of 32, he died of a fever, leaving behind a fragile empire that would break up soon after into the Hellenistic Kingdoms.
One of the biggest impacts that Alexander had was spreading Greek culture. Greek become the common language of the region, kind of like English is the common language of the world today.
Since no account of his life was written while he was alive, many of the stories about him are mythologized and embellished, which helps add to his reputation. He has been admired by many great leaders throughout the years, including the Roman Pompey the Great as well as Napoleon Bonaparte.