It is a communist country.
France. Long before that the area now known as Vietnam was part of the Khmer Empire, the remnant of which is now known as Cambodia.
It was mainly in Vietnam which when the war began was divided into the Republic of Vietnam (known as RVN or South Vietnam) and the Democratic Republic of Vietnam (known as DRV or North Vietnam). After the war ended (with defacto victory for North Vietnam) both Vietnam's were re-united. That state is now called the Socialist Republic of Vietnam. During the war fighting also spilled over into neighbouring Laos and Cambodia.
French Indochina, now known as Vietnam
After France gained power in the 1850s, until 1950, the area now comprised of Cambodia, Laos and Vietnam was known in parts of the world as French Indochina.
See site: Vietnam
See website: Vietnam
The city of Saigon which is now known as Ho Chi Minh City, is in the nation of Vietnam which is in the continent of Asia.
See site: Vietnam
See website: Vietnam
Hanoi is the capital of Vietnam
Giap was the most known.
The former NORTH Vietnam won the war; they are known as just Vietnam today.