Khmer Rouge
The Khmer Rouge killed nearly two million Cambodians from 1975 to 1979, spreading like a virus from the jungles until they controlled the entire country, only to systematically dismantle and destroy it in the name of a Communist agrarian ideal. The Khmer Rouge took root in Cambodia's northeastern jungles as early as the 1960s, a guerrilla group driven by communist ideals that nipped the periphery of government-controlled areas.
Simultaneously, the Khmer Rouge were planning the steps necessary for a radical shift to an agrarian society. It was deadly arrogance. With the cities emptied and the population under Khmer Rouge control, Pol Pot's means of implementation was to begin exterminating anyone who didn't fit this new ideal. He declared that he was turning Cambodia. It's impossible to tally the total number dead with any precision, but it is generally assumed that the Khmer Rouge killed between one million and two million people during their reign.
Simultaneously, the Khmer Rouge were planning the steps necessary for a radical shift to an agrarian society. It was deadly arrogance. With the cities emptied and the population under Khmer Rouge control, Pol Pot's means of implementation was to begin exterminating anyone who didn't fit this new ideal. He declared that he was turning Cambodia. It's impossible to tally the total number dead with any precision, but it is generally assumed that the Khmer Rouge killed between one million and two million people during their reign.