Sihanoukville (Khmer: ក្រុងព្រះសីហនុ - Krong Preah Sihanouk), also known as Kampong Saom, is a province (khaet) of Cambodia on the Gulf of Thailand. This port city is a growing Cambodian urban center, located 185 kilometres (115 mi) southwest of the Cambodian capital, Phnom Penh. During the Vietnam War, it became an intensive military port first in the service of National Front for the Liberation of South Vietnam and after 1970, with the regime of General Lon Nol, at the service of the United States.