Indo-Scythians is a term used to refer to Scythians (Sakas), who migrated into parts of Central Asia and northern South Asia (Sogdiana, Bactria, Arachosia, Gandhara, Kashmir, Punjab, Haryana, Rajasthan, UP and Bihar.), from the middle of the 2nd century BCE to the 4th century CE.
The first Saka king in India was Maues (Moga) (1st century BCE) who established Saka power in Gandhara and gradually extended supremacy over north-western India. Indo-Scythian rule in India ended with the last Western Satrap Rudrasimha III in 395 CE.
The invasion of India by Scythian tribes from Central Asia, often referred to as the Indo-Scythian invasion, played a significant part in the history of South Asia as well as nearby countries. In fact, the Indo-Scythian war is just one chapter in the events triggered by the nomadic flight of Central Asians from conflict with tribes such as the Xiongnu in the 2nd century CE, which had lasting effects on Bactria, Kabul, Parthia and India as well as far-off Rome in the west.
It has been claimed that ancient Roman historians including Arrian and Claudius Ptolemy have mentioned that the ancient Sakas ('Sakai') were basically nomads. However, Italo Ronca, in his detailed study of Ptolemy's chapter vi, marks the statement: "The land of the Sakai belongs to nomads, they have no towns but dwell in forests and caves" as spurious.
Read more about Indo-Scythians: Origins, Settlement in Sakastan, Indo-Scythian Coinage, Depiction of Indo-Scythians, The Indo-Scythians and Buddhism, Indo-Scythians in Western Sources, Indo-Scythians in Indian Literature, Sai-Wang Scythian Hordes of Chipin or Kipin, Establishment of Mlechcha Kingdoms in Northern India, Evidence About Joint Invasions, Descendants of The Indo-Scythians