Answer :
The ruler who conquered the Persian Empire in 334 BCE was Alexander the Great.
Alexander the Great was a Greek king who conquered a vast empire that included Greece, Persia, Egypt, and parts of India during his reign from 336-323 BCE. He was tutored by the philosopher Aristotle and succeeded his father, Philip II, to the throne of Macedon at the age of 20.
The ancient Greek kingdom of Macedon was ruled by Alexander III of Macedon, also known as Alexander the Great. At the age of 20, he succeeded his father Philip II to the throne in 336 BC. During the majority of his time in power, he led a lengthy military campaign in Western Asia and Egypt.
Until the age of 16, Alexander was coached by Aristotle. When he became king of Macedon in 335 BC, he went on a campaign in the Balkans, retaking Thrace and Illyria, and marching on the city of Thebes, which was later destroyed in battle. After that, Alexander was in charge of the League of Corinth and used his power to start the pan-Hellenic project that his father had planned. He was in charge of all the Greeks as they conquered Persia.
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