Original sentence: Under the reign of Philip II (359–336 BC), the kingdom of Macedonia, initially at the periphery of classical Greek affairs, came to dominate Ancient Greece in the span of just 25 years, largely thanks to the personality and policies of its king
Edited sentence: Under the reign of Philip II (359–336 BC), the Hellenic kingdom of Macedon initially at the periphery of classical Greek affairs, came to dominate the entire Hellenic world, in the span of just 25 years, largely thanks to the personality and policies of its king