What city-state led by Phillip II was able to conquer the whole of Greece?

The city-state led by Philip II that was able to conquer the whole of Greece is Macedon. Under his leadership, Philip II unified the Greek city-states through a combination of military prowess and strategic alliances, culminating in his victory at the Battle of Chaeronea in 338 BCE. This conquest laid the foundation for the subsequent expansion of his son, Alexander the great, and the spread of Hellenistic culture.