The contrast between the steep-faced Cambodian side and the smooth northern slope of the cordillera is well displayed in this movie. Even though some areas have been cleared, vast numbers of landmines were laid by the People's Republic of Kampuchea government in the 1980s as part of a huge planned operation using thousands of conscripted workers along the Dângrêk mountain range and other parts of the Thai-Cambodian border. The alleged purpose was to hinder Pol Pot's regrouped Khmer Rouge from entering Cambodia from Thailand. This defensive line, part of the legacy of the violent conflicts that engulfed Cambodia in the latter part of the 20th century, is known as the K-5 Belt. After the end of the Vietnamese occupation of Cambodia in 1989 and the withdrawal of the Vietnam People's Army, the Khmer Rouge rebuilt their former bases in the Dângrêk mountain range area, along the border of Cambodia in order to fight against the Kampuchean People's Revolutionary Armed Forces, the armed forces of the State of Cambodia. Anlong Veng, a small town at the foot of these hills, became for a while the main "capital" of the Khmer Rouge. In the 1990s the Khmer Rouge still controlled Anlong Veng, where there was one of the first "killing fields" after the fall of "Democratic Kampuchea". There is still an unexcavated site in a forest with landmines in the Dângrêk Mountains, about 6 km north of Anlong Veng where 3,000 people were allegedly killed by the Khmer Rouge for having become "corrupted" as late as between 1993 and 1997. These executions were carried out during Ta Mok's leadership in the area. Illegal logging of phayung ('Siamese rosewood') is rampant in the Dângrêk Mountains. Although officially a protected tree, the logs cut on the Cambodian side are usually smuggled into Thailand by the hundreds. In Thailand and China this wood is highly valued in the furniture industry. Preah Vihear temple dispute In 1959, the Thai military seized the ancient Khmer Preah Vihear Temple from Cambodia. In 1962 Cambodia gained worldwide recognition for sovereignty from the International Court. Recently the issue of Cambodian sovereignty in the Cambodian–Thai border dispute has been used by certain nationalist factions in Thailand as a tool to help discredit the current Thai government as part of the continuing power struggle within Thailand. In mid-2011, three districts of Surin Province in the Dângrêk Range were declared "disaster zones" following