This song is about Pol Pot and the Cambodian revolution. Killing fields were the collective farms he sent his people to die from slave labor. Another brutal history lesson from Slayer \m/ Pol Pot attempted his own "Super Great Leap Forward" in Cambodia, which he renamed the Democratic Republic of Kampuchea. He began by declaring, "This is Year Zero," and that society was about to be "purified." Capitalism, Western culture, city life, religion, and all foreign influences were to be extinguished in favor of an extreme form of peasant Communism. All of Cambodia's cities were then forcibly evacuated. At Phnom Penh, two million inhabitants were evacuated on foot into the countryside at gunpoint. As many as 20,000 died along the way. Millions of Cambodians accustomed to city life were now forced into slave labor in Pol Pot's "KILLING FIELDS" where they soon began dying from overwork, malnutrition and disease, on a diet of one tin of rice (180 grams) per person every two days.