Beginning about A.D1200 two outside Forces attacked the Indianized court civilizations of southeast Asia. Thai tribes descended from the north, overthrew the Khmer empire, and substituted their own more warlike and more tumultuous dominion in the Mekong valley. Missionaries in time converted the Thai to a form of Buddhism bearing a Burmese-Tibetan rather than an Indian stamp. Simultaneously, Moslem missionary enterprise gathered headway as a result of the internal changes in the Islamic community which we have already noticed. Accordingly, Sumatra, and presently Java and distant Mindanao in the Philippines became the seats of moslem regimes. Sooner or later Hindu cults disappeared every-where, save in the island of Bali, where something of the older life survived until modern times.