The famous ruler known for his military conquests and expansion of the Macedonian Empire is Alexander the Great. Ascending to the throne at a young age, he quickly established himself as a formidable commander, uniting Greece and embarking on an ambitious campaign against the Persian Empire. His strategies, combined with his remarkable ability to inspire loyalty, enabled him to achieve significant victories, such as at the battles of Granicus, Issus, and Gaugamela. By the time of his death in 323 BCE, Alexander had created one of the largest empires in history, stretching from Greece to northwest India, and his legacy profoundly influenced subsequent cultures and military tactics.