The Aegean sea washes Greece on two sides: first, the side that faces towards the east and stretches from Sunium, towards the north as far as the The… - Strabo

There remain of Europe, first, Macedonia and the part of Thrace that are contiguous to it and extend as far as Byzantium; secondly, Greece; and thirdly, the Islands that are close by. Macedonia, of course, is a part of Greece, yet now, since I am following the nature and shape of the place geographically, I have decided to classify it apart from the rest of Greece and to join it with that part of Thrace...

What is now called Macedonia was in earlier times called Emathia. And it took its present name from Macedon, one of its early chieftains. And there was also a city emathia close to the sea. Now a part of this country was taken and held by certain of the Epeirotes and the Illyrians, but most of it by the Bottiaei and the Thracians. The Bottiaei came from Crete originally, so it is said, along with Botton as chieftain. As for the Thracians, the Pieres inhabited Pieria and the region about Olympus; the Paeones, the region on both sides of the Axius River, which on that account is called Amphaxitis; the Edoni and Bisaltae, the rest of the country as far as the Strymon. Of these two peoples the latter are called Bisaltae alone, whereas a part of the Edoni are called Mygdones, a part Edones, and a part Sithones. But of all these tribes the Argeadae, as they are called, established themselves as masters, and also the Chalcidians of Euboea; for the Chalcidians of Euboea also came over to the country of the Sithones and jointly peopled about thirty cities in it, although later on the majority of them were ejected and came together into one city, Olynthus; and they were named the Thracian Chalcidians.

And Macedonia, of course, is a part of Greece.