What type of army was the U. S. facing in Vietnam​

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Explanation:

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For administrative and logistical support Army units looked to the U.S. Army Support Group, Vietnam (later the U.S. Army Support Command), which was established in mid-1962. Though command.

In the context of the Vietnam War (1955–1975), the army was referred to as the North Vietnamese Army (NVA). This allowed writers, the U.S. military, and the general public, to distinguish northern communists from the southern communists, called Viet Cong or National Liberation Front. However, both groups ultimately worked under the same ...

Founded: 22 December 1944; 76 years ago

Service branches: Ground Force, Air Force, Navy, Border Guard, Coast Guard, Cyberspace Operations, Mausoleum Defence

Headquarters: Hanoi, Vietnam

Explanation:

the answer for 3 is b and the answer for 4 is d