Ho Chi Minh City is the largest city in Vietnam. It was once known as Prey Nokor, an important Khmer sea port prior to annexation by the Vietnamese in the 17th century.
Under the name Saigon, it was the capital of the French colony of Cochin-china and later of the independent republic of South Vietnam from 1955–75. South Vietnam, as an anti-communist, capitalist republic, fought against the communist North Vietnamese and Viet Cong during the Vietnam War, with aid from the United States and countries including Australia, New Zealand and South Korea. Saigon fell when it was captured by the communists on 30 April 1975, ending the war with a Communist victory. Vietnam was then turned into a communist state with the South overtaken. On 2 July 1976, Saigon merged with the surrounding Gia Định Province and was officially renamed Ho Chi Minh City after Hồ Chí Minh (although the name Sài Gòn is still commonly used).
The city center is situated on the banks of the Saigon River, 60 kilometers (37 mi) from the South China Sea and 1,760 kilometers (1,090 mi) south of Hanoi, the capital of Vietnam.
The metropolitan area, which consists of the Ho Chi Minh City metropolitan area,Thủ Dầu Một, Dĩ An, Biên Hòa and surrounding towns, is populated by more than 9,000,000 people, making it the most populous metropolitan area in Vietnam and the countries of the former French Indochina. The city's population is expected to grow to 13.9 million in 2025.
The greater Ho Chi Minh City metropolitan area, a metropolitan area covering most parts of Đông Nam Bộ plus Tiền Giang and Long An provinces under planning, will have an area of 30,000 square kilometers with a population of 20 million inhabitants by 2020. According to the Mercer Human Resource Consulting, Economist Intelligence Unit and ECA International, Ho Chi Minh City is ranked 132 on the list of world's most expensive cities for expatriate