Indo-Scythians (also called Indo-Sakas) were a group of nomadic Iranian peoples of Scythian origin who migrated from Central Asia southward into northern and western regions of ancient India from the middle of the 2nd century BCE to the 4th century CE.
Recent archeological and genetic data suggests that the Western and Eastern Scythians of the 1st millennium BC originated independently, but both combine Yamnaya-related ancestry, which spread eastwards from the area of the European steppes, with an East Asian-related component, which most closely corresponds to the modern North Siberian Nganasan people of the lower Yenisey River, to varying degrees, but generally higher among Eastern Scythians.
On the other hand, archaeological evidence now tends to suggest that the origins of Scythian culture, characterized by its kurgans burial mounds and its Animal style of the 1st millennium BC, are to be found among Eastern Scythians rather than their Western counterparts: eastern kurgans are older than western ones (such as the Altaic kurgan Arzhan 1 in Tuva), and elements of the Animal style are first attested in areas of the Yenisei river and modern-day China in the 10th century CE. The rapid spread of Scythian culture, from the Eastern Scythians to the Western Scythians, is also confirmed by significant east-to-west gene flow across the steppes during the 1st millennium BC.
The Sakas spoke a language belonging to the Iranian branch of the Indo-European languages. The Pazyryk burials of the Pazyryk culture in the Ukok Plateau in the 4th and 3rd centuries BC are thought to be of Saka chieftains. These burials show striking similarities with the earlier Tarim mummies at Gumugou. The Issyk kurgan of south-eastern Kazakhstan, and the Ordos culture of the Ordos Plateau has also been connected with the Saka. It has been suggested that the ruling elite of the Xiongnu was of Saka origin. Some scholars contend that in the 8th century BC, a Saka raid on Altai may be “connected” with a raid on Zhou China.
Greek historians wrote of the wars between the Saka and the Medes, as well as their wars against Cyrus the Great of the Persian Achaemenid Empire where Saka women were said to fight alongside their men.
Saka women dressed in much the same fashion as men. A Pazyryk burial, discovered in the 1990s, contained the skeletons of a man and a woman, each with weapons, arrowheads, and an axe. Herodotus mentioned that Sakas had “high caps and … wore trousers.” Clothing was sewn from plain-weave wool, hemp cloth, silk fabrics, felt, leather and hides.