Kingdom of Kartli
Iberia (Georgian — იბერია, Latin: Iberia and Greek: Ἰβηρία), also known as Iveria (Georgian: ივერია), was a name given by the ancient Greeks and Romans to the ancient Georgian kingdom of Kartli[1] (4th century BC – 5th century AD), corresponding roughly to the eastern and southern parts of the present day Georgia.[2][3] The term Caucasian Iberia (or Eastern Iberia) is used to distinguish it from the Iberian Peninsula, where the present day countries of Spain, Portugal and Andorra are located.
The area was inhabited in earliest times by several related tribes in Kura-Araxes culture, collectively called Iberians (the Eastern Iberians) by ancient authors. Locals called their country Kartli after a mythic chief, Kartlos. The Moschi, mentioned by various classic historians, and their possible descendants, the Saspers (who were mentioned by Herodotus), may have played a crucial role in the consolidation of the tribes inhabiting the area.
Moschi had moved slowly to the northeast forming settlements as they traveled. The chief of these was Mtskheta, the future capital of the Iberian kingdom. The Mtskheta tribe was later ruled by a principal locally known as mamasakhlisi (“the father of the household” in Georgian).
The medieval Georgian source Moktsevai Kartlisai (“Conversion of Kartli”) also speaks about Azo and his people, who came from Arian-Kartli – the initial home of the proto-Iberians, which had been under Achaemenid rule until the fall of the Persian Empire – to settle on the site where Mtskheta was to be founded. Another Georgian chronicle Kartlis Tskhovreba (“History of Kartli”) claims Azo to be an officer of Alexander’s, who massacred a local ruling family and conquered the area, until being defeated at the end of the 4th century BC by Prince Pharnavaz, who was at that time a local chief.
The story of Alexander’s invasion of Kartli, although entirely fictional, nevertheless reflects the establishment of Georgian monarchy in the Hellenistic period and the desire of later Georgian literati to connect this event to the celebrated conqueror.
Pharnavaz I and his descendants
Pharnavaz, victorious in a power struggle, became the first king of Iberia (ca. 302-ca. 237 BC). Driving back an invasion, he subjugated the neighboring areas, including a significant part of the western Georgian state of Colchis (locally known as Egrisi), and seems to have secured recognition of the newly founded state by the Seleucids of Syria. Then Pharnavaz focused on social projects, including the citadel of the capitol, the Armaztsikhe, and the idol of the god Armazi. He also reformed the Georgian written language, and created a new system of administration, subdividing the country into several counties called saeristavos. His successors managed to gain control over the mountainous passes of the Caucasus with the Daryal (also known as the Iberian Gates) being the most important of them.
Roman Georgia
Rome's conquests reached the Caucasus area at the end of the 2nd century BC, when the Roman Republic started to expand in Anatolia and the Black Sea.
In the area of what is now western Georgia there was the Kingdom of Colchis that in those years has fallen under control of the Kingdom of Pontus (an enemy of Rome), while further east there was the "Kingdom of Iberia". As a result of the brilliant Roman campaigns of Pompey and Lucullus in 65 BC, the Kingdom of Pontus was completely destroyed by the Romans and all its territory, including Colchis, was incorporated into the Roman Empire as its province. Iberia, on the other hand was invaded and became a vassal state of the empire.
From this point on Colchis became the Roman province of Lazicum, with Emperor Nero later incorporating it into the Province of Pontus in 63 AD, and successively in Cappadocia by Domitian in 81 AD. At the same time, Iberia continued to be a vassal state because it enjoyed significant independence and with the lowlands frequently raided by fierce mountain tribes, paying a nominal homage to Rome in exchange of protection was viewed as a worthwhile investment.
This close association with Armenia and Pontus brought upon the country an invasion (65 BC) by the Roman general Pompey, who was then at war with Mithradates VI of Pontus, and Armenia; but Rome did not establish her power permanently over Iberia. Nineteen years later, the Romans again marched (36 BC) on Iberia forcing King Pharnavaz II to join their campaign against Albania.
While another Georgian kingdom of Colchis was administered as a Roman province, Iberia freely accepted the Roman Imperial protection. A stone inscription discovered at Mtskheta speaks of the first-century ruler Mihdrat I (AD 58-106) as "the friend of the Caesars" and the king "of the Roman-loving Iberians." Emperor Vespasian fortified the ancient Mtskheta site of Arzami for the Iberian kings in 75 AD.
The next two centuries saw a continuation of Roman influence over the area, but by the reign of King Pharsman II (116 – 132) Iberia had regained some of its former power. Relations between the Roman Emperor Hadrian and Pharsman II were strained, though Hadrian is said to have sought to appease Pharsman. However, it was only under Hadrian's successor Antoninus Pius that relations improved to the extent that Pharsman is said to have even visited Rome, where Dio Cassius reports that a statue was erected in his honor and that rights to sacrifice were given. The period brought a major change to the political status of Iberia with Rome recognizing them as an ally, rather than their former status as a subject state, a political situation which remained the same, even during the Empire's hostilities with the Parthians.