Starting in 1965 and continuing for three decades, Cambodia was embroiled in armed conflict. US bombings during the Vietnam War made Cambodia perhaps the most bombed country in history. Many of these bombs did not explode, leaving UXO throughout the country. Following this period, the Khmer Rouge came to power resulting in the Cambodian genocide. The Khmer Rouge were eventually pushed to the Cambodia-Thailand border, where significant numbers of landmines were deployed by both Cambodia and Thailand to prevent the Khmer Rouge from entering their respective countries.