The Indo-Greek Kingdom or Graeco-Indian Kingdom was an Hellenistic kingdom covering various parts of Afghanistan and the northwest regions of the Indian subcontinent, during the last two centuries BC and was ruled by more than thirty kings, often conflicting with one anotherThe invasion of northern India, and the establishment of what would be known as the "Indo-Greek kingdom", started around 200 BCE whenDemetrius, son of the Greco-Bactrian kingEuthydemus I,

Indo-Greek influence declined from the time Bactria itself was attacked by the nomadic tribes from central Asia, the scythians.

The penetration of Indo-Greeks, as well as of sakas pahlavas and Kushana influenced the government, society, religion literature and art of ancient India. The very fact that India absorbed influences of these foreigners speaks for the then youthful nature of Indian civilization.

The extent of Greek influence of Indian Civilisation is a most point. Whatever the Greek influence that was felt by India came in the wake of Alexander's invasion of the cast and the settlement of Greeks in the Bactrian region. Alexander himself cannot be regarded as the standard bearer of the heritage of ancient Greece. By the time Alexander and his soldiers marched towards the east the culture of Greece was on the decline hence at the most Alexander and his men could have spread a debased version of the great Geek civilization represented by Socrates, Plato, Phidia, Aristotle, Sophocles, Pythagoras and others. Despite the fact that Alexander and his men could not be the true torch bearers of Greek culture to the east, the traces of Greek influence could be definitely found on India civilization.