Ho Chi Minh City began as a small fishing village known as Prey Nokor. The area that the city now occupies was originally swampland, and was inhabited by Khmer people for centuries before the arrival of the Vietnamese. It should be noted that in Khmer folklore southern Vietnam was given to the Vietnamese government as a dowry for the marriage of a Vietnamese princess to a Khmer prince in order to stop constant invasions and pillaging of Khmer villages.
Khmer territory
Beginning in the early 17th century, colonization of the area by Vietnamese settlers gradually isolated the Khmer of the Mekong Delta from their brethren in Cambodia proper and resulted in their becoming a minority in the delta. In 1623, King Chey Chettha II of Cambodia (1618–1628) allowed Vietnamese refugees fleeing the Trịnh–Nguyễn civil war in Vietnam to settle in the area of Prey Nokor and to set up a custom house there. Increasing waves of Vietnamese settlers, which the Cambodian kingdom could not impede because it was weakened by war with Thailand, slowly Vietnamized the area. In time, Prey Nokor became known as Saigon. Prey Nokor was the most important commercial seaport to the Khmers. The loss of the city prevented the Cambodians access to the South China Sea. Subsequently, the Khmers' access to the sea was now limited to the Gulf of Thailand.
Nguyễn Dynasty rule
In 1698, Nguyễn Hữu Cảnh, a Vietnamese noble, was sent by the Nguyễn rulers of Huế by sea to establish Vietnamese administrative structures in the area, thus detaching the area from Cambodia, which was not strong enough to intervene. He is often credited with the expansion of Saigon into a significant settlement. A large Vauban citadel called Gia Định was built,
