The Soviet Union supported the Vietnamese in their 1978 invasion of Cambodia, an invasion considered by the First World, most notably the United States, and the People's Republic of China to be under the direct command of the Soviet Union. The USSR also became the largest backer of the new puppet state in Cambodia, the People's Republic of Kampuchea (PRK). In a 1979 summit Jimmy Carter complained to Brezhnev about the presence of Vietnamese troops in Cambodia, to which Brezhnev replied that the citizens of the PRK were delighted about the overthrow of the Khmer Rouge-led government; in this, as historian Archie Brown notes, he was right.