Since 1550: Burma suffers under a decline in trading. 1553 (3250, Yin Water Ox): Hong Empire forges a formal military alliance with its SE Asian client kingdoms, directed against Bengal and other possible enemies. 1561: On Mindanao, Muslim preachers start to criticize the arriving Han disturbing their society and the Hong emperor being overlord of the sultan. 1564: Tibetan exilees arrive in Bhutan, unite the country for the first time. 1566 (3263, Yang Fire Tiger): Earthquake of Shaanxi, killing almost a million people. 1569-88: Conquest of the Delhi Sultanate by Persia.