The Hellenistic expansion brought the Ancient Greeks in India also known as Indo-Greeks. They established the Graeco-Indian Kingdom or Indo-Greek Kingdom covering various parts of the northwest and northern Indian subcontinent during the last two centuries BC, and was ruled by more than 30 Hellenistic kings, often in conflict with each other. The kingdom was founded when the Graeco-Bactrian king Demetrius invaded India early in the second century BC. The Greeks in India were eventually divided from the Graeco-Bactrian Kingdom centered in Bactria (now the border between Afghanistan and Uzbekistan).
The expression "Indo-Greek Kingdom" loosely describes a number of various dynastic polities. There were numerous cities, such as Taxila, Pakistan's Punjab, or Pushkalavati and Sagala.These cities would house a number of dynasties in their times, and based on Ptolemy's Geographia and the nomenclature of later kings, a certain Theophila in the south was also probably a satrapal or royal seat at some point.
During the two centuries of their rule, the Indo-Greek kings combined the Greek and Indian languages and symbols, as seen on their coins, and blended ancient Greek, Hindu and Buddhist religious practices, as seen in the archaeological remains of their cities and in the indications of their support of Buddhism, pointing to a rich fusion of Indian and Hellenistic influences. The diffusion of Indo-Greek culture had consequences which are still felt today, particularly through the influence of Greco-Buddhist art.
The Indo-Greeks ultimately disappeared as a political entity around 10 AD following the invasions of the Indo-Scythians, although pockets of Greek populations probably remained for several centuries longer under the subsequent rule of the Indo-Parthians and Kushans.