answers: 30 April 1975
context: the UN General Assembly. Then, in a bold move, Hun Sen renamed the Kampuchean People's Revolutionary Party as the Cambodian People's Party in an effort to portray his party as a democratic institution and renounce its revolutionary struggle. On 23 October 1991, the Cambodian factions of the Supreme National Council, along with Vietnam and 15 member nations of the International Peace Conference on Cambodia, signed the Paris Peace Agreement. For the Cambodian people, two decades of continuous warfare and 13 years of civil war seemed to be over, although an atmosphere of uneasiness amongst the leaders of the Cambodian factions </s> at Huế. Facing an increasing casualty count, rising domestic opposition to the war, and growing international condemnation, the US began withdrawing from ground combat roles in the early 1970s. This process also entailed an unsuccessful effort to strengthen and stabilise South Vietnam. Following the Paris Peace Accords of 27 January 1973, all American combat troops were withdrawn by 29 March 1973. In December 1974, North Vietnam captured the province of Phước Long and started a full-scale offensive, culminating in the fall of Saigon on 30 April 1975. South Vietnam was briefly ruled by a provisional government for almost eight years </s> than the other two regions. Hanoi, being the capital of French Indochina, was the only place in Northern Vietnam with significant French influence. From 1954 to 1975, Vietnam was again divided into two separate nations, divided by the Bến Hải River in Quảng Trị Province at the 17th parallel. The North, ruled by a communist government, was allied with communist China and the Soviet Union, while the South had a free-market economy, quasi-democratic government and had contact with the United States, the West and Western-aligned nations. Although the nation has been united since 1975, linguistic, cultural, and other differences serve
question: when did north vietnam and south vietnam unite