HO CHI MINH CITY
Ho Chi Minh City also known by its former name of Saigon is the most populous city in
Vietnam with a population of 8.4 million (13 million in the metropolitan area) as of 2017.
Located in southeastern Vietnam, the metropolis surrounds the Saigon River and covers about 2,061 square kilometres (796 square miles). From 1955 to 1975, Saigon was the capital of the Republic of Vietnam, commonly known as South Vietnam.
[From Wikipedia]
MEKONG DELTA
The Mekong Delta also known as the Western Region is the region in southwestern Vietnam where the Mekong River approaches and empties into the sea through a network of distributaries.
The Mekong delta region encompasses a large portion of southwestern Vietnam of over 40,500 square kilometres (15,600 sq mi). The size of the area covered by water depends on the season.
Before 1975, Mekong Delta is part of Republic of Vietnam. Mekong Delta is home of the IV Corps region during Vietnam War. IV Corps is the only corps in South Vietnam that VC didn't attack significantly until the last President Duong Van Minh surrender to North Vietnam.
[From Wikipedia]
