Provisional Revolutionary Government of the Republic of South Vietnam, also known as Republic of South Vietnam or PRG was a former country that existed in Asia from 1969 to 1976. It was established on 6 June, 1969 with the support of North Vietnam and Viet Cong. The PRG existed as an underground government to the Republic of Vietnam until 1975. On 30 April, 1975, following the surrender of the government of Republic of Vietnam, the PRG officially became the government of Southern Vietnam. From then, it existed as an puppet state of North Vietnam. On 2 July, 1976, the PRG merged with North Vietnam to create a new country - Socialist Republic of Vietnam.