were inhabited from the middle of the third millennium BC by Indo-European people who spoke a Proto-Greek language. Hence, a part of this historical population later moved to Mycenae around 1600 BC and properly established the Mycenaean civilisation. Antiquity In ancient times, the incorporated territory of Albania was historically inhabited by Indo-European peoples, among them numerous Illyrian tribes, Ancient Greeks and Thracians. In view of the Illyrian tribes, there is no evidence that these tribes used any collective nomenclature for themselves, while it is regarded to be unlikely that they used a common endonym. The endonym Illyrians seems to be the name applied to a specific Illyrian tribe, which was the first to come in liaison with the Ancient Greeks resulting in the endonym Illyrians to be applied pars pro toto to all people of similar language and customs. The territory referred to as Illyria corresponded roughly to the area east of the Adriatic Sea in the Mediterranean Sea extending in the south to the mouth of the Vjosë. The first account of the Illyrian groups comes from Periplus of the Euxine Sea, an ancient Greek text written in the middle of the 4th century BC. The west was inhabited by the Thracian tribe of the Bryges while the south was inhabited by the Ancient Greek-speaking tribe of the Chaonians, whose capital was at Phoenice. Other colonies such as Apollonia, Epidamnos, and Amantia, were established by Ancient Greek city-states on the coast by the 7th century BC. The Illyrian Ardiaei tribe, centred in Montenegro, ruled over most of the territory of Albania. Their Ardiaean Kingdom reached its greatest extent under King Agron, the son of Pleuratus II. Agron extended his rule over other neighbouring tribes as well. Following Agron's death in 230 BC, his wife, Teuta, inherited the Ardiaean kingdom. Teuta's forces extended their operations further southwards to the Ionian Sea. In 229 BC, Rome declared war on the kingdom for extensively plundering Roman ships. The war ended in Illyrian defeat in 227 BC. Teuta was eventually succeeded by Gentius in 181 BC. Gentius clashed with the Romans in 168 BC, initiating the Third Illyrian War. The conflict resulted in Roman conquest of the region by 167 BC. The Romans split the region into three administrative divisions. Middle Ages The Roman Empire was split in 395 upon the death of Theodosius I into an Eastern and Western Roman Empire in