Ancient writers about Macedonia - Thucydides

"The country by the sea which is now called Macedonia... Alexander, the father of Perdiccas, and his forefathers, who were originally Temenidae from Argos"
(Thucydides 99,3)

"In all there were about three thousand Hellenic heavy infantry, accompanied by all the Macedonian cavalry with the Chalcidians, near one thousand strong, besides an immense crowd of barbarians."
(Thukydides 4.124)

"The Hellenic troops with him consisted of the Ambraciots, Leucadians, and Anactorians, and the thousand Peloponnesians with whom he came; the barbarian of a thousand Chaonians, who, belonging to a nation that has no king, were led by Photys and Nicanor, the two members of the royal family to whom the chieftainship for that year had been confided. With the Chaonians came also some Thesprotians, like them without a king, some Molossians and Atintanians led by Sabylinthus, the guardian of King Tharyps who was still a minor, and some Paravæans, under their king Oroedus, accompanied by a thousand Orestians, subjects of King Antichus and placed by him under the command of Oroedus. There were also a thousand Macedonians sent by Perdiccas without the knowledge of the Athenians, but they arrived too late. With this force Cnemus set out, without waiting for the fleet from Corinth. Passing through the territory of Amphilochian Argos, and sacking the open village of Limnæa, they advanced to Stratus the Acarnanian capital; this once taken, the rest of the country, they felt convinced, would speedily follow"
(Thucydides Chapter VIII)