Read this: The west Balkan coast was inhabited by various Illyrian tribes and kingdoms such as the kingdom of the Dalmatae and of the Ardiaei, who often engaged in piracy under Queen Teuta (reigned 231 BC to 227 BCE). Further inland was the Illyrian Paeonian Kingdom and the tribe of the Agrianes which covers most of the modern republic of Macedonia. Illyrians on the coast of the Adriatic were under the effects and influence of Hellenisation and some tribes adopted Greek, becoming bilingual due to their proximity to the Greek colonies in Illyria. Illyrians imported weapons and armor from the Ancient Greeks (such as the Illyrian type helmet, originally a Greek type) and also adopted the ornamentation of Ancient Macedon on their shields and their war belts (a single one has been found, dated 3rd century BC at modern Selce e Poshtme part of Macedon at the time under Philip V of Macedon).

What tribes inhabited the Balkan Coast?
What is the answer? (If it cannot be answered, return "unanswerable")
Illyrian