Alexander the Great’s empire lasted for about 15 years. It began in 334 BC when he set out on his campaign against the Persian Empire and lasted until his death in 323 BC.
After he ascended to the throne of Macedonia, Alexander embarked on a series of military conquests that expanded his territory across three continents, including parts of Europe, Asia, and Africa. His most notable victories included the Battle of Granicus, the Battle of Issus, and the Battle of Gaugamela, which led to the fall of the Persian Empire.
However, the vast territory he conquered did not remain unified for long after his death at the age of 32. Following his passing, Alexander’s empire faced many challenges, including power struggles among his generals, known as the Diadochi, and regional uprisings. Ultimately, the empire fragmented and was divided among several of his former commanders. Despite its relatively short duration in terms of a unified empire, Alexander’s conquests had a lasting impact on history, culture, and the spread of Hellenistic civilization.