Greco-Bactrian Kingdom

Kingdom of Bactria Βασιλεία τῆς Βακτριανῆς Basileía tês Baktrianês
256 BC – c. 120 BC
Eucratides the Great wearing the Bactrian version of the Boeotian helmet, shown on his gold 20-stater, the largest gold coin ever minted in the ancient world, c. 2nd century BC.
Approximate maximum extent of the Greco-Bactrian Kingdom circa 170 BC, under the reign of Eucratides the Great, including the regions of Tapuria and Traxiane to the west, Sogdiana and Ferghana to the north, Bactria and Arachosia to the south.
Capital	Bactra Ai-Khanoum
Common languages	Greek (official) Bactrian Sanskrit Aramaic Sogdian Parthian
Religion	Greek polytheism Greco-Buddhism Zoroastrianism
Government	Hellenistic Monarchy
Basileus
• 256–239 BC	Diodotus I (first)
• 117–100 BC	Heliocles I (last)
Historical era	Antiquity
• Established	256 BC
• Disestablished	c. 120 BC
Area
184 BC[1]	2,500,000 km2 (970,000 sq mi)
Preceded by Succeeded by Seleucid Empire Indo-Greek Kingdom Parthian Empire Kushan Empire

The Greco-Bactrian Kingdom (Greek: Βασιλεία τῆς Βακτριανῆς, romanized: Basileía tês Baktrianês, lit. 'Kingdom of Bactria') was a Greek state of the Hellenistic period^[2][3][4] located in Central Asia. The kingdom was founded by the Seleucid satrap Diodotus I Soter in about 256 BC, and continued to dominate Central Asia until its fall around 120 BC.^[a]

At its peak, the kingdom consisted of present-day Afghanistan, Tajikistan, Uzbekistan, and Turkmenistan, and for a short time, small parts of Kazakhstan, Pakistan and Iran. An extension further east, with military campaigns and settlements, may have reached the borders of the Qin State in China by about 230 BC.^[5][6]

Although a Greek population was already present in Bactria by the 5th century BC, Alexander the Great conquered the region by 327 BC^[7] and founded many cities, most of them named Alexandria, and further settled with Macedonians and other Greeks. After the death of Alexander, control of Bactria passed on to his general Seleucus I Nicator.^[8] The fertility and the prosperity of the land by the early 3rd century BC led to the creation of the Greco-Bactrian kingdom by Diodotus 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, as a successor state of the Greco-Bactrian kingdom, and was subsequently ruled by kings Pantaleon and Apollodotus I. Historical records indicate that many rich and prosperous cities were present in the kingdom,^[9][10][11] but only a few such cities 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.^[12]

The kingdom reached the height of its power under king Eucratides the Great, who seems to have seized power through a coup around 171 BC and created his own dynasty. Eucratides also invaded India and successfully fought against the Indo-Greek kings. However, soon after this the kingdom began to decline. The Parthians and nomadic tribes such as Sakas and Yuezhi became a major threat.^[13] 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.^[14]

Even after the fall of the Greco-Bactrian kingdom, their rich Hellenistic influence remained strong 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 known for its high level of Hellenistic sophistication. Greek art travelled from Bactria with the Indo-Greeks and influenced Indian art, religion and culture, leading to new syncretic art called Greco-Buddhist art.

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