The Khmer Empire lasted from 802 AD to 1432 AD, ruling much of Southeast Asia during its peak around 1200 AD. It followed a feudal system of rule and strict Hindu social class structure. Key rulers like Jayavarman II who founded the empire and Suryavarman II who built Angkor Wat expanded its territories, while Jayavarman VII made Buddhism the dominant religion and initiated construction projects, though the empire went into decline after his rule. The empire officially ended in 1432 after a recurring pattern of dislocation, turmoil, reunification and expansion over the centuries.