Alexander, son of King Phillip II of Macedonia and Queen Olympias and taught by Aristotle, would become known as The Great well before his death.
At the age of sixteen he was leading troops in his father's army, and by eighteen helped his father conquer Greece.
Phillip was assassinated in 336 BC, and Alexander took the throne.
Two years later he invaded Persia, facing superior and larger forces, Alexander simply out maneuvered and used extremely efficient strategy to beat his foes, never losing a single battle.
By 330 BC all of Persia and Asia Minor had been made part of his empire, and by 327 northern India and much of Central Asia as well.
As he went he founded cities and spread Greek culture, political structure, and economics.
In 326 his army refused to continue, they were simply tired of fighting and wanted to go home.
Whilst back in Babylon, building a fleet to return home, Alexander became ill, and on June 13, 323 BC Alexander the Great died.
He had never declared a successor, and his only child was yet unborn.
By 322 his army and empire had split into factions, who constantly tried to conquer each other.