Buddhism
This period marks the first known spread of Buddhism beyond India. According to the edicts of Asoka, emissaries were sent to various countries west of India to spread Buddhism (Dharma), particularly in eastern provinces of the neighboring Seleucid Empire, and even farther to Hellenistic kingdoms of the Mediterranean. It is a matter of disagreement among scholars whether or not these emissaries were accompanied by Buddhist missionaries.

Q: What were the emissaries used for?
to spread Buddhism