Tigranes the Great family Artaxiad Dynasty
Early years
In approximately 120 BC, the Parthian king Mithridates II (r. 124–91 BC) invaded Armenia and made its king Artavasdes I acknowledge Parthian suzerainty. Artavasdes I was forced to give the Parthians Tigranes, who was either his son or nephew, as a hostage. Tigranes lived in the Parthian court at Ctesiphon, where he was schooled in Parthian culture. Tigranes remained a hostage at the Parthian court until c. 96/95 BC, when Mithridates II released him and appointed him as the king of Armenia. Tigranes ceded an area called "seventy valleys" in the Caspiane to Mithridates II, either as a pledge or because Mithridates II demanded it. Tigranes' daughter Ariazate had also married a son of Mithridates II, which has been suggested by the modern historian Edward Dąbrowa to have taken place shortly before he ascended the Armenian throne as a guarantee of his loyalty. Tigranes would remain a Parthian vassal until the late 80s BC.When he came to power, the foundation upon which Tigranes was to build his Empire was already in place, a legacy of the founder of the Artaxiad Dynasty, Artaxias I, and subsequent kings. The mountains of Armenia, however, formed natural borders between the different regions of the country and as a result, the feudalistic nakharars had significant influence over the regions or provinces in which they were based. This did not suit Tigranes, who wanted to create a centralist empire. He thus proceeded by consolidating his power within Armenia before embarking on his campaign.He deposed Artanes, the last king of the Kingdom of Sophene and a descendant of Zariadres.Wars against the Parthians and Seleucids
After the death of Mithridates II of Parthia his son Gotarzes I succeeded him. He reigned during a period coined in scholarship as the "Parthian Dark Age," due to the lack of clear information on the events of this period in the empire, except a series of, apparently overlapping, reigns. This system of split monarchy weakened Parthia, allowing Tigranes II of Armenia to annex Parthian territory in western Mesopotamia. This land would not be restored to Parthia until the reign of Sinatruces (r. c. 78–69 BC).
 The changes of fortune experienced by Tigranes were varied, for at first he was a hostage among the Parthians; and then through them he obtained the privilege of returning home, they receiving as reward therefore seventy valleys in Armenia; but when he had grown in power, he not only took these places back but also devastated their country, both that about Ninus (Nineveh), and that about Arbela; and he subjugated to himself the rulers of Atropene and Gordyaea (on the Upper Tigris), and along with these the rest of Mesopotamia, and also crossed the Euphrates and by main strength took Syria itself and Phoenicia —Strabo
In 83 BC, after bloody strife for the throne of Syria, governed by the Seleucids, the Syrians decided to choose Tigranes as the protector of their kingdom and offered him the crown of Syria. Magadates was appointed as his governor in Antioch.  He then conquered Phoenicia and Cilicia, effectively putting an end to the last remnants of the Seleucid Empire, though a few holdout cities appear to have recognized the shadowy boy-king Seleucus VII Philometor as the legitimate king during his reign. The southern border of his domain reached as far as Ptolemais (modern Akko). Many of the inhabitants of conquered cities were sent to his new metropolis of Tigranocerta.
At its height, his empire extended from the Pontic Alps (in modern north-eastern Turkey) to Mesopotamia, and from the Caspian Sea to the Mediterranean. A series of victories led him to assume the Achaemenid title of King of Kings, which even the Parthian kings did not assume, appearing on coins struck after 85 BC. He was called "Tigranes the Great" by many Western historians and writers, such as Plutarch. The "King of Kings" never appeared in public without having four kings attending him. Cicero, referring to his success in the east, said that he "made the Republic of Rome tremble before the prowess of his arms."Tigranes' coins consist of tetradrachms and copper coins having on the obverse his portrait wearing a decorated Armenian tiara with ear-flaps. The reverse has a completely original design. There are the seated Tyche of Antioch and the river god Orontes at her feet.Offspring
Tigranes had four sons and three daughters. The eldest son, Zariadres, according to Appian and Valerius Maximus rebelled against Tigranes and was killed during a battle (possibly late 90s BCE). Appian also mentions an unnamed younger son who was executed for conspiring against Tigranes: he disregarded his father's health and wore Tigranes's crown (Tigranes having been injured during a hunting accident). His third son, Tigranes the Younger, who showed great care for his injured father and was rewarded for his loyalty, has already been mentioned. He is also alleged to have led a military campaign in 82 BCE. Tigranes was succeeded by his fourth and youngest son, Artavasdes II.
One daughter of Tigranes according to Cassius Dio married Mithridates I of Atropatene. Another daughter married Parthian prince Pacorus, son of Orodes II. Parchments of Avroman also mention his third daughter, Ariazate "Automa", who married Gotarzes I of Parthia.Although Cleopatra of Pontus is usually considered to be their mother (Appian writes that she gave birth to three sons), historian Gagik Sargsyan considered only Artavasdes II and one of the unnamed daughters to be her children. According to him, the rest had a different mother and were born before Tigranes became king. The reasoning behind it is that if Tigranes the Younger did indeed lead a campaign in 82 BCE, then he and hence his two older brothers (and possibly two sisters) would be too old to be Cleopatra's children. Another argument supporting this claim would be the situation with Ariazate. As she was probably the mother of Orodes I (r. 80–75 BC), then Ariazate could not have been the daughter of Cleopatra who married Tigranes only in 94 BCE at the age of 15 or 16. Sargsyan also proposed a possible candidate as Tigranes's first wife and the children's mother: Artaxiad princess Zaruhi, a daughter of Tigranes's paternal uncle Zariadres and granddaughter of Artaxias I. He also considered likely that the reason for the rebellion of Tigranes's son Zariadres was the birth of Artavasdes who was declared the heir by virtue of being born to a king and not a prince.
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