Greco-Bactrian Kingdom

A Greek population was already present in Bactria by the 5th century BC. Alexander the Great had conquered the region by 327 BC, founding many cities, most of them named Alexandria, and further settling Macedonians and other Greeks. After the death of Alexander, control of Bactria passed on to his general Seleucus I Nicator. The fertility and the prosperity of the region led to the creation of the Greco-Bactrian kingdom under Diodotus by the early 3rd century BC, as a successor state of the Seleucid Empire. The Bactrian Greeks grew increasingly more powerful and invaded north-western India between 190 and 180 BC under king Demetrius, the son of Euthydemus. This invasion led to the creation of the Indo-Greek Kingdom, which in turn was a successor to the Greco-Bactrian kingdom, and was subsequently ruled by the kings Pantaleon and Apollodotus I. Historical records indicate that many rich and prosperous cities were present in the kingdom, but only a few of them have been excavated, such as Ai-Khanoum and Bactra. The city of Ai-Khanoum, in north-eastern Afghanistan, had all the hallmarks of a true Hellenistic city with a Greek theater, gymnasium and some houses with colonnaded courtyards.

The kingdom reached its peak under Eucratides the Great, who seems to have seized power through a coup around 171 BC and established his own dynasty. Eucratides also invaded India and successfully fought against the Indo-Greek kings. However, soon the kingdom began to decline. The Parthians and nomadic tribes such as Sakas and Yuezhi became a major threat. Eucratides was killed by his own son in about 145 BC, which may have further destabilised the kingdom. Heliocles was the last Greek king to rule in Bactria.

Even after the fall of the Greco-Bactrian kingdom, their rich Hellenistic legacy lasted for many more centuries. The Yuezhi invaders settled in Bactria and became Hellenized. They subsequently founded the Kushan Empire around 30 AD, and adopted the Greek alphabet to write their language and added Greek deities to their pantheon. The Greco-Bactrian city of Ai-Khanoum was at the doorstep of India and was known for its sophistication and Hellenistic features. Greek art was spread by the Indo-Greeks; influencing Indian art, religion and culture, leading to a new style of syncretic art called Greco-Buddhist art.

History

Origins

The Oxus Valley region was originally settled by nomadic Zoroastrian tribes, referred to generally as Scythian by classical Greek writers. Bactria is referenced multiple times in the Avesta. In Zaroastrian writings the region is associated with the Turanian people.

Bactria (known to the Greeks as Βακτριανή, i.e. Baktrianē) was inhabited by Greek settlers since the time of Darius I, when the majority of the population of Barca, in Cyrenaica, was deported to the region for refusing to surrender assassins. Greek influence increased under Xerxes I, after the descendants of Greek priests who had once lived near Didyma (western Asia Minor) were forcibly relocated in Bactria, and later on with other exiled Greeks, most of them prisoners of war. Greek communities and language were already common in the area by the time that Alexander the Great conquered Bactria in 328 BC.

Alexander the Great crossed the Hindu Kush in 329 BCE in pursuit of the Persian Satrap Bessus, entering the Oxus valley that same year. Following the execution of Bessus, Alexander began the process of pacification in Bactria and neighboring Sogdiana, depositing garrisons at Bactra, Maracanda, and Cyropolis. It was at this time that Alexander massacred the Greek community that had previously been settled in the region.

Settlement of newly established colonies along the Oxus and the Jaxartes was carried out by predominantly Greek mercenaries cut loose from the main body of Alexander's army due to injury, age, or questionable loyalty. 20,000 Greek soldiers were summoned from the Balkans to reinforce Alexander's army. This served to replace immense casualties suffered during a mass revolt in Bactria and Sogdiana, as well as to weaken a fledgling anti-Macedonian uprising back in Greece.

In 326 BCE the Greek colonists staged a rebellion and attempted to march home to Greece following rumors of Alexander's death. A Greek named Athenodorus declared himself king of Bactria before confirmations of Alexander's survival caused the rebellion to melt away.

Independence and Diodotid dynasty

Diodotus, the satrap of Bactria (and probably the surrounding provinces) founded the Greco-Bactrian Kingdom when he seceded from the Seleucid Empire around 250 BC and became Basileus, or king Diodotus I of Bactria. The preserved ancient sources (see below) are somewhat contradictory, and the exact date of Bactrian independence has not been settled. Somewhat simplified, there is a high chronology (c. 255 BC) and a low chronology (c. 246 BC) for Diodotus' secession. The high chronology has the advantage of explaining why the Seleucid king Antiochus II issued very few coins in Bactria, as Diodotus would have become independent there early in Antiochus' reign. On the other hand, the low chronology, from the mid-240s BC, has the advantage of connecting the secession of Diodotus I with the Third Syrian War, a catastrophic conflict for the Seleucid Empire.

Diodotus, the governor of the thousand cities of Bactria (Latin: Theodotus, mille urbium Bactrianarum praefectus), defected and proclaimed himself king; all the other people of the Orient followed his example and seceded from the Macedonians.

The new kingdom, highly urbanized and considered one of the richest of the Orient (opulentissimum illud mille urbium Bactrianum imperium "The extremely prosperous Bactrian empire of the thousand cities", according to the historian Justin), was to further grow in power and engage in territorial expansion to the east and the west:

The Greeks who caused Bactria to revolt grew so powerful on account of the fertility of the country that they became masters, not only of Ariana, but also of India, as Apollodorus of Artemita says: and more tribes were subdued by them than by Alexander… Their cities were Bactra (also called Zariaspa, through which flows a river bearing the same name and emptying into the Oxus), and Darapsa, and several others. Among these was Eucratidia, which was named after its ruler.

In 247 BC, the Ptolemaic empire (the Greek rulers of Egypt following the death of Alexander the Great) captured the Seleucid capital, Antioch. In the resulting power vacuum, Andragoras, the Seleucid satrap of Parthia, proclaimed independence from the Seleucids, declaring himself king. A decade later, he was defeated and killed by Arsaces of Parthia, leading to the rise of a Parthian Empire. This cut Bactria off from contact with the Greek world. Overland trade continued at a reduced rate, while sea trade between Greek Egypt and Bactria developed.

Diodotus was succeeded by his son Diodotus II, who allied himself with the Parthian Arsaces in his fight against Seleucus II:

Soon after, relieved by the death of Diodotus, Arsaces made peace and concluded an alliance with his son, also by the name of Diodotus; some time later he fought against Seleucos who came to punish the rebels, and he prevailed: the Parthians celebrated this day as the one that marked the beginning of their freedom.

Euthydemid dynasty and Seleucid invasion

Euthydemus, an Ionian Greek from Magnesia according to Polybius, and possibly satrap of Sogdiana, overthrew the dynasty of Diodotus II around 230–220 BC and started his own dynasty. Euthydemus's control extended to Sogdiana, going beyond the city of Alexandria Eschate founded by Alexander the Great in Ferghana:

And they also held Sogdiana, situated above Bactriana towards the east between the Oxus River, which forms the boundary between the Bactrians and the Sogdians, and the Iaxartes River. And the Iaxartes forms also the boundary between the Sogdians and the nomads.

Euthydemus was attacked by the Seleucid ruler Antiochus III around 210 BC. Although he commanded 10,000 horsemen, Euthydemus initially lost a battle on the Arius and had to retreat. He then successfully resisted a three-year siege in the fortified city of Bactra, before Antiochus finally decided to recognize the new ruler, and to offer one of his daughters to Euthydemus's son Demetrius around 206 BC. Classical accounts also relate that Euthydemus negotiated peace with Antiochus III by suggesting that he deserved credit for overthrowing the original rebel Diodotus and that he was protecting Central Asia from nomadic invasions thanks to his defensive efforts:

... for if he did not yield to this demand, neither of them would be safe: Seeing that great hordes of Nomads were close at hand, who were a danger to both; and that if they admitted them into the country, it would certainly be utterly barbarised.

In an inscription found in the Kulob area of Tajikistan, in eastern Greco-Bactria, and dated to 200–195 BC, a Greek by the name of Heliodotus, dedicating a fire altar to Hestia, mentions Euthydemus as the greatest of all kings, and his son Demetrius I as "Demetrios Kallinikos", meaning "Demetrius the Glorious Conqueror":

τόνδε σοι βωμὸν θυώδη, πρέσβα κυδίστη θεῶν Ἑστία, Διὸς κ(α)τ᾽ ἄλσος καλλίδενδρον ἔκτισεν καὶ κλυταῖς ἤσκησε λοιβαῖς ἐμπύροις Ἡλιόδοτος ὄφρα τὸμ πάντων μέγιστον Εὐθύδημον βασιλέων τοῦ τε παῖδα καλλίνικον ἐκπρεπῆ Δημήτριον πρευμενὴς σώιζηις ἐκηδεῖ(ς) σὺν τύχαι θεόφρον[ι].

tónde soi bōmòn thuṓdē, présba kydístē theôn Hestía, Diòs kat' álsos kallídendron éktisen kaì klytaîs ḗskēse loibaîs empýrois Hēliódotos óphra tòm pántōn mégiston Euthýdēmon basiléōn toû te paîda kallínikon ekprepê Dēmḗtrion preumenḕs sṓizēis ekēdeî(s) sỳn Týchai theόphron(i).

"Heliodotus dedicated this fragrant altar for Hestia, venerable goddess, illustrious amongst all, in the grove of Zeus, with beautiful trees; he made libations and sacrifices so that the greatest of all kings Euthydemus, as well as his son, the glorious, victorious and remarkable Demetrius, be preserved of all pains, with the help of Tyche with divine thoughts."

Following the departure of the Seleucid army, the Bactrian kingdom seems to have expanded. In the west, areas in north-eastern Iran may have been absorbed, possibly as far as into Parthia, whose ruler had been defeated by Antiochus the Great. These territories possibly are identical with the Bactrian satrapies of Tapuria and Traxiane.

Expansion into the Indian subcontinent (around 180 BC)

Demetrius, the son of Euthydemus, started an invasion of the subcontinent before 180 BC, and a few years after the Mauryan Empire had been overthrown by the Shunga dynasty. Historians differ on the motivations behind the invasion. Some historians suggest that the invasion of the subcontinent was intended to show their support for the Mauryan Empire, and to protect the Buddhist faith from the religious persecutions of the Shungas as alleged by Buddhist scriptures (Tarn). Other historians have argued however that the accounts of these persecutions have been exaggerated (Thapar, Lamotte).

Demetrius may have been as far as the imperial capital Pataliputra in today's eastern India (today Patna). However, these campaigns are typically attributed to Menander. His conquests were mentioned along with that of Menander by the historian Strabo, as having "subdued more tribes than Alexander." The invasion was completed by 175 BC. This established in the northwestern Indian Subcontinent what is called the Indo-Greek Kingdom, which lasted for almost two centuries until around 10 AD. The Buddhist faith flourished under the Indo-Greek kings, especially Menander who was arguably the most powerful of them all. It was also a period of great cultural syncretism, exemplified by the development of Greco-Buddhism in the region of Gandhara.

Eucratides the Great

Back in Bactria, Eucratides I, either a general of Demetrius or an ally of the Seleucids, managed to overthrow the Euthydemid dynasty and establish his own rule, the short-lived Eucratid dynasty, around 170 BC, probably dethroning Antimachus I and Antimachus II. The Indian branch of the Euthydemids tried to strike back. An Indian king called Demetrius (very likely Demetrius II) is said to have returned to Bactria with 60,000 men to oust the usurper, but he apparently was defeated and killed in the encounter:

Eucratides led many wars with great courage, and, while weakened by them, was put under siege by Demetrius, king of the Indians. He made numerous sorties, and managed to vanquish 60,000 enemies with 300 soldiers, and thus liberated after four months, he put India under his rule.

Eucratides campaigned extensively in present-day northwestern India, and ruled a vast territory, as indicated by his minting of coins in many Indian mints, possibly as far as the Jhelum River in Punjab. In the end, however, he was repulsed by the Indo-Greek king Menander I, who managed to create a huge unified territory.

In a rather confused account, Justin explains that Eucratides was killed on the field by "his son and joint king", who would be his own son, either Eucratides II or Heliocles I (although there are speculations that it could have been his enemy's son Demetrius II). The son drove over Eucratides' bloodied body with his chariot and left him dismembered without a sepulcher:

As Eucratides returned from India, he was killed on the way back by his son, whom he had associated to his rule, and who, without hiding his parricide, as if he didn't kill a father but an enemy, ran with his chariot over the blood of his father, and ordered the corpse to be left without a sepulture.

Defeats by Parthia

During or after his Indian campaigns, Eucratides was attacked and defeated by the Parthian king Mithridates I, possibly in alliance with partisans of the Euthydemids:

The Bactrians, involved in various wars, lost not only their rule but also their freedom, as, exhausted by their wars against the Sogdians, the Arachotes, the Dranges, the Arians and the Indians, they were finally crushed, as if drawn of all their blood, by an enemy weaker than them, the Parthians.

Following his victory, Mithridates I gained Bactria's territory west of the Arius, the regions of Tapuria and Traxiane: "The satrapy Turiva and that of Aspionus were taken away from Eucratides by the Parthians."

In the year 141 BC, the Greco-Bactrians seem to have entered in an alliance with the Seleucid king Demetrius II to fight again against Parthia:

The people of the Orient welcomed his (Demetrius II's) arrival, partly because of the cruelty of the Arsacid king of the Parthians, partly because, used to the rule of the Macedonians, they disliked the arrogance of this new people. Thus, Demetrius, supported by the Persians, Elymes and Bactrians, routed the Parthians in numerous battles. At the end, deceived by a false peace treaty, he was taken prisoner.

The 5th-century historian Orosius reports that Mithridates I managed to occupy territory between the Indus and the Hydaspes towards the end of his reign (c. 138 BC, before his kingdom was weakened by his death in 136 BC).

Heliocles I ended up ruling what territory remained. The defeat, both in the west and the east, may have left Bactria very weakened and open to nomadic invasions.

Nomadic invasions and fall

A nomadic steppe people called the Yuezhi inhabited a region thousands of miles to the east of Bactria on the edges of the Han Empire called the Hexi Corridor. Shortly before 176 BC, the Xiongnu invaded the Hexi Corridor, forcing the Yuezhi to flee the region. In 162 BC the Yuezhi were driven west to the Ili River valley by the Xiongnu. In 132 they were driven out of the Ili valley by the Wusun. The surviving Yuezhi migrated again south towards the territory just north of the Oxus River where they encountered and expelled a nomadic steppe nation called Sakastan.

Around 140 BC, eastern Scythians (the Saka, or Sacaraucae of Greek sources), apparently being pushed forward by the southward migration of the Yuezhi started to invade various parts of Parthia and Bactria. Their invasion of Parthia is well documented: they attacked in the direction of the cities of Merv, Hecatompolis and Ecbatana. They managed to defeat and kill the Parthian king Phraates II, son of Mithridates I, routing the Greek mercenary troops under his command (troops he had acquired during his victory over Antiochus VII). Again in 123 BC, Phraates's successor, his uncle Artabanus I, was killed by the Scythians.

When the Han Chinese diplomat Zhang Qian visited the Yuezhi around 126 BC, trying to obtain their alliance to fight the Xiongnu, he explained that the Yuezhi were settled north of the Oxus but also held under their sway the territory south of Oxus, which makes up the remainder of Bactria.

According to Zhang Qian, the Yuezhi represented a considerable force of between 100,000 and 200,000 mounted archer warriors, with customs identical to those of the Xiongnu, which would probably have easily defeated Greco-Bactrian forces (in 208 BC when the Greco-Bactrian king Euthydemus I confronted the invasion of the Seleucid king Antiochus III the Great, he commanded 10,000 horsemen). Zhang Qian actually visited Bactria (named Daxia in Chinese) in 126 BC, and portrays a country which was totally demoralized and whose political system had vanished, although its urban infrastructure remained:

Daxia (Bactria) is located over 2,000 li southwest of Dayuan, south of the Gui (Oxus) river. Its people cultivate the land and have cities and houses. Their customs are like those of Dayuan. It has no great ruler but only a number of petty chiefs ruling the various cities. The people are poor in the use of arms and afraid of battle, but they are clever at commerce. After the Great Yuezhi moved west and attacked Daxia, the entire country came under their sway. The population of the country is large, numbering some 1,000,000 or more persons. The capital is called the city of Lanshi (Bactra) and has a market where all sorts of goods are bought and sold. (Records of the Great Historian by Sima Qian, quoting Zhang Qian, translation by Burton Watson)

The Yuezhi further expanded southward into Bactria around 120 BC, apparently further pushed out by invasions from the northern Wusun. It seems they also pushed Scythian tribes before them, which continued to India, where they came to be identified as Indo-Scythians.

This invasion of Bactria is also described in western Classical sources from the 1st century BC:

The best known tribes are those who deprived the Greeks of Bactriana, the Asii, Pasiani, Tochari, and Sacarauli, who came from the country on the other side of the Jaxartes, opposite the Sacae and Sogdiani.

Around that time the king Heliocles abandoned Bactria and moved his capital to the Kabul valley, from where he ruled his Indian holdings. Apparently there were two other Greco-Bactrian kings preceding Heliocles in the same region and from the same dynasty, named Eucratides II and Plato Epiphanes, the latter probably being a brother of Eucratides I. Since Heliocles left the Bactrian territory, he is technically the last Greco-Bactrian king, although several of his descendants, moving beyond the Hindu Kush, would form the western part of the Indo-Greek kingdom. The last of these "western" Indo-Greek kings, Hermaeus, would rule until around 70 BC, when the Yuezhi again invaded his territory in the Paropamisadae (while the "eastern" Indo-Greek kings would continue to rule until around AD 10 in the area of the Punjab region).

Overall, the Yuezhi remained in Bactria for more than a century. They became Hellenized to some degree, as suggested by their adoption of the Greek alphabet to write their later Iranian court language, and by numerous remaining coins, minted in the style of the Greco-Bactrian kings, with the text in Greek.

There is evidence for the persistence of Greek populations in Bactria after the collapse of the Greco-Bactrian kingdom. For example, an obol of a previously unknown ruler called Antigonus has been found and it seems he ruled after the kingdom's collapse, as evidenced by the use of a lunate sigma and the lower art quality of the coin, perhaps dating from the end of the 1st century BC. Antigonus might have briefly won a battle against the Yuezhi or the Saka before he was overrun himself.

Around 12 BC the Yuezhi then moved further to northern India where they established the Kushan Empire.