Alexander the Great: Military Might and Hellenistic Legacy Alexander The Geat also known as Alexander the Third of Macedon became King of Macedon after the death of his father King Philip II in 336 BCE. Alexander is known for both his military might and his diplomatic skills which aided in his expansion of the Macedonian Kingdom to an empire of a size his father had not even dreamed of Alexander is recognized as a key figure in the spread of Greek culture and language throughout the ancient worl