When the Khmer Rouge seized Phnom Penh. People have been tricked out of the city to the countryside and Mr. Pol Pot wants to change the Cambodian back to the traditional elite, labor for the agriculture, everyone must be farmers, living in a labor camp and working 12 hours a day without a break as well as there are no sufficient food for over four years, Mr. Pol Pot is in power. So, it makes people starve to death, abused, killed hugely "killing fields" occur at the time the policy is that the innocent are killed. The Khmer Rouge want to Cambodia is a country that has only one lineage is the descent of Cambodia and the minority people of Vietnam, Chinese people are killing that has killed an estimated 1.5-2 million people counted as genocide. Such as the genocide that the worst of the 20th century.