Magnificent Champa architecture, from Vijaya.

The silver towers. The Champa was a civilization that disputed the powers over the vassalage and maritime and land routes connecting southern China (the red river dai Vietnamese borders) and the Chinese sea route. The Champa was overthrown by the Khmer emperors and Vijaya became a central point of trade route under the command of Jayavarman VII to monitor and keep the Khmer empirical power up to the Chinese border. Before its events took case, under Jayavarman VII, the Khmer controlled the Yunnan border to which important transition and import such as perfumes , gems textile and fruits from Southeast Asia were delivered to the Chinese and Indians Sri Lankan and Indonesian . Under the monitoring by Burmese (Bagan) for the emperor khmer king , The adaman maritime route was also controlled by the Khmer