How did buddhism spread throughout asia on the map

Buddhism spread across Asia through networks of overland and maritime routes between India, Southeast Asia, Central Asia, and China. The transmission of Buddhism to Central Asia and China corresponded with the development of the silk routes as channels for intercultural exchanges.

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.