Bactrians were the inhabitants of Bactria.
Several important trade routes from India and China (including the Silk Road) passed through Bactria and, as early as the Bronze Age, this had allowed the accumulation of vast amounts of wealth by the mostly nomadic population.
The first proto-urban civilization in the area arose during the 2nd millennium BC.

Control of these lucrative trade routes, however, attracted foreign interest, and in the 6th century BC the Bactrians were conquered by the Persians, and in the 4th century BC by Alexander the Great.
These conquests marked the end of Bactrian independence.
From around 304 BC the area formed part of the Seleucid Empire, and from around 250 BC it was the centre of a Greco-Bactrian kingdom, ruled by the descendants of Greeks who had settled there following the conquest of Alexander the Great.

The Greco-Bactrians, also known in Sanskrit as Yavanas, worked in cooperation with the native Bactrian aristocracy.
By the early 2nd century BC the Greco-Bactrians had created an impressive empire that stretched southwards to include north-west India.
By about 135 BC, however, this kingdom had been overrun by invading Yuezhi tribes, an invasion that later brought about the rise of the powerful Kushan Empire.

Bactrians were recorded in Strabo's Geography'
"Now in early times the Sogdians and Bactrians did not differ much from the nomads in their modes of life and customs, although the Bactrians were a little more civilised; however, of these, as of the others, Onesicritus does not report their best traits, saying, for instance, that those who have become helpless because of old age or sickness are thrown out alive as prey to dogs kept expressly for this purpose, which in their native tongue are called "undertakers," and that while the land outside the walls of the metropolis of the Bactrians looks clean, yet most of the land inside the walls is full of human bones; but that Alexander broke up the custom."


The Bactrians spoke Bactrian, a north-eastern Iranian language.
Bactrian became extinct, replaced by north-eastern Iranian languages such as Pashto, Yidgha, Munji, and Ishkashmi.
The Encyclopaedia Iranica states:
Bactrian thus occupies an intermediary position between Pashto and Yidgha-Munji on the one hand, Sogdian, Choresmian, and Parthian on the other: it is thus in its natural and rightful place in Bactria.

 The principal religions of the area before Islam were Zoroastrianism and Buddhism.
Contemporary Tajiks are the descendants of ancient Eastern Iranian inhabitants of Central Asia, in particular, the Sogdians and the Bactrians, and possibly other groups, with an admixture of Western Iranian Persians and non-Iranian peoples.
The Encyclopædia Britannica states:
The Tajiks are the direct descendants of the Iranian peoples whose continuous presence in Central Asia and northern Afghanistan is attested from the middle of the 1st millennium bc.
The ancestors of the Tajiks constituted the core of the ancient population of Khwārezm (Khorezm) and Bactria, which formed part of Transoxania (Sogdiana).
They were included in the empires of Persia and Alexander the Great, and they intermingled with such later invaders as the Kushāns and Hepthalites in the 1st–6th centuries ad.
Over the course of time, the eastern Iranian dialect that was used by the ancient Tajiks eventually gave way to Persian, a western dialect spoken in Iran and Afghanistan.
Bactrians were the inhabitants of Bactria. Several important trade routes from India and China (including the Silk Road) passed through Bactria and, as early as the Bronze Age, this had allowed the accumulation of vast amounts of wealth by the mostly nomadic population. The first proto-urban civilization in the area arose during the 2nd millennium BC.
Control of these lucrative trade routes, however, attracted foreign interest, and in the 6th century BC the Bactrians were conquered by the Persians, and in the 4th century BC by Alexander the Great. These conquests marked the end of Bactrian independence. From around 304 BC the area formed part of the Seleucid Empire, and from around 250 BC it was the centre of a Greco-Bactrian kingdom, ruled by the descendants of Greeks who had settled there following the conquest of Alexander the Great.
The Greco-Bactrians, also known in Sanskrit as Yavanas, worked in cooperation with the native Bactrian aristocracy. By the early 2nd century BC the Greco-Bactrians had created an impressive empire that stretched southwards to include north-west India. By about 135 BC, however, this kingdom had been overrun by invading Yuezhi tribes, an invasion that later brought about the rise of the powerful Kushan Empire.
Bactrians were recorded in Strabo's Geography'
"Now in early times the Sogdians and Bactrians did not differ much from the nomads in their modes of life and customs, although the Bactrians were a little more civilised; however, of these, as of the others, Onesicritus does not report their best traits, saying, for instance, that those who have become helpless because of old age or sickness are thrown out alive as prey to dogs kept expressly for this purpose, which in their native tongue are called "undertakers," and that while the land outside the walls of the metropolis of the Bactrians looks clean, yet most of the land inside the walls is full of human bones; but that Alexander broke up the custom."

The Bactrians spoke Bactrian, a north-eastern Iranian language. Bactrian became extinct, replaced by north-eastern Iranian languages such as Pashto, Yidgha, Munji, and Ishkashmi. The Encyclopaedia Iranica states:
Bactrian thus occupies an intermediary position between Pashto and Yidgha-Munji on the one hand, Sogdian, Choresmian, and Parthian on the other: it is thus in its natural and rightful place in Bactria.
 The principal religions of the area before Islam were Zoroastrianism and Buddhism. Contemporary Tajiks are the descendants of ancient Eastern Iranian inhabitants of Central Asia, in particular, the Sogdians and the Bactrians, and possibly other groups, with an admixture of Western Iranian Persians and non-Iranian peoples. The Encyclopædia Britannica states:
The Tajiks are the direct descendants of the Iranian peoples whose continuous presence in Central Asia and northern Afghanistan is attested from the middle of the 1st millennium bc. The ancestors of the Tajiks constituted the core of the ancient population of Khwārezm (Khorezm) and Bactria, which formed part of Transoxania (Sogdiana). They were included in the empires of Persia and Alexander the Great, and they intermingled with such later invaders as the Kushāns and Hepthalites in the 1st–6th centuries ad. Over the course of time, the eastern Iranian dialect that was used by the ancient Tajiks eventually gave way to Persian, a western dialect spoken in Iran and Afghanistan.
Bactria