Killing Fields are located in Cambodia, where a number of people from 1.7 to 2.2 million people died during the era of Khmer Rouge. The party of Rouge executed all people considered to be enemies including all intellectuals, and anyone who was associated with a foreign government. It was the era of Cambodian Genocide under brutal leadership. Throughout the Killing Fields, there are numerous bones and skulls sticking out of the ground. 

    Before the reign of Khmer Rouge, Cambodia was ruled by Japan. In 1945, King Sihanouk declared independence of Cambodia and in 1953, Cambodia gained freedom from police and military authority. Cambodia then became a completely independent state from Japan and France. Shortly following, Sihanouk withdrew diplomatic relations from the U.S. who were in conflict with Vietnam and created neutral government policies. Soon in 1970, pro-U.S. militants carried out a coup in cooperation with the U.S. and ousted the king, when Lon Nol seized power. However, the U.S. air raid had completely devastated Cambodian farmlands. Naturally, the economy collapsed and many people became refugees.