Pailin is a small municipality in the West of Cambodia very closed to the border of Thailand. The provincial capital is called Pailin City and is known to much of the world as being the area where many of the Khmer Rouge leaders came from and retreated after their fall. Until the year of 2001 Pailin was part of the Battambang Province, but was then elevated to city status and thus became a province and autonomous zone of its own.