Cultural changes began to affect Southeast Asia around two thousand years ago with influences coming from two directions. Chinese expansion south of the Yangtze River eventually led to the colonization of Vietnam. Chinese control was permanently ended in 1427, but Confucian philosophy had a lasting influence when Vietnam became independent. Buddhism and Taoism also reached Vietnam via China. In the rest of mainland Southeast Asia, and in the western areas of the Malay-Indonesian archipelago, expanding trade across the Bay of Bengal meant Indian influences were more pronounced. These influences were most obvious when large sedentary populations were engaged in growing irrigated rice, like northern Vietnam, Cambodia, Thailand, Burma, Java, and Bali. Rulers and courts in these areas who adopted Hinduism or forms of Buddhism promoted a culture which combined imported ideas with aspects of local society.
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