To support the see that the first form of Buddhism introduce to Thailand was that of the Theravada School as propagated by King Asoka the Great.it have evidence from the Mahavamsa. In one of its passages dealing with the propagation of the Dhamma the Mahavamsa records that Asoka sent missionaries headed by Buddhist elders to as many as nine territories. One of these territories was known as Suvarnabhumi where two Theras Sona and Uttara were said to have proceeded.