Greece was united by Alexander the Great.
Philip of Macedon united most of the Greek mainland in the fourth century BC , with his son Alexander the Great rapidly conquering much of the ancient world , spreading Greek culture and science from the eastern Mediterranean to the Indus River .	Greek	Greek people	mainland	Geography of Greece	Philip of Macedon	Philip of Macedon	Alexander the Great	Alexander the Great	rapidly conquering much of the ancient world	Macedonian Empire	Indus River	Indus River
