The population was divided up between “old” people or rural peasants, and “new” people, those associated with the former political and economic elites, the intellectuals, or more often those who could read. Democratic Kampuchea wiped out traditional Cambodian culture, norms, religion, organisations, and networks. The Khmer Rouge were eventually overthrown by Vietnamese troops in 1979, but they waged a guerrilla war against the invaders in a coalition with the Royalist faction. In 1991, the international community brokered a peace agreement that lead to the re-establishment of a parliamentary monarchy in the Kingdom of Cambodia. Civil war erupted again in 1997, when the members of the coalition government, the royalist and people’s parties clashed militarily