Phnom Penh (; official Romanization: Phnum Pénh; IPA: [pʰnum peːɲ]) is the capital city of Cambodia. It is the largest and most populous city in the country. It is also the capital of the Phnom Penh administrative city. On April 17 1975, it was seized by the Khmer Rouge who soon forced everyone to leave. It was later retaken from the Khmer Rouge by the Vietnamese Army in January 1979.