Perhaps the greatest military genius of the ancient world, the warrior-king Alexander III of Macedon (356–323 B.C.) conquered territories stretching from Greece to. Alexander the Great Alexander of Macedon Biography. King of Macedonia and Conqueror of the Persian Empire. Alexander III the Great, the King. Alexander was born on the sixth day of the ancient Greek month of Hekatombaion, which probably corresponds to 20 July 356 BC, although the exact date is not known, in. Alexander, the King of Macedonia and one of the greatest military leaders in the history of warfare, conquers much of the known world. Find out more about the history of Alexander the Great, including videos, interesting articles, pictures, historical features and more. Get all the facts on HISTORY.com The true story of one of history's most luminous and influential leaders, Alexander the Great--a man who had conquered 90% of the known world by the age of twenty. Alexander is a masculine given name. Alexander may also refer to: Contents 1 People 2 Maritime 3 Companies and brands 4 Places 5 Plants 6 Film, television and games 7. Macedonian King Alexander the Great united Greece, led the Corinthian League and conquered the Persian Empire. Learn more at Biography.com.