The VC lived off caches, captured, and smuggled weapons.
The NVA brought theirs down with them, when they marched down the Ho Chi Minh Trail.
The USSR gave aid to North Vietnam. China sent aid to the Vietcong via North Vietnam.
The United States, Canada, Australia and Korea contributed military aid to the South Vietnamese government in their attempt to stop incursion from Communist North Vietnam.
November 16, 1961 John F. Kennedy ordered more help to be sent to the aid of South Vietnam. President Kennedy was concerned over the advances being made by the Vietcong guerrillas.
The US, Australia, New Zealand, South Korea, Thailand, Philippines, and South Vietnam, verses North Vietnam and the Viet Cong (with material aid from the Soviet Union and Red China).
hold your nose and put ice on it
During his term, Eisenhower will greatly increase U.S. military aid to the French in Vietnam to prevent a Communist victory. Or the US feared that Vietnam would vote for a communist government
Well, for one thing, North Vietnam no longer existed after the war. There was only "a Vietnam." Secondly, the former "North" Vietnam was the victor during the war...and the victor seldom needs economic aid. And third, the victor was a communist enemy during the cold war...the Commander in Chief, President Nixon, in all probability wouldn't have aided and abetted the enemy.
The US supplied massive military aid to South Vietnam. All in vain, as it turned out.
North Vietnam started the war against South Vietnam; the US went to the aid of the South.
US sent military aid to France in 1940 to help them take over Vietnam.
It is somewhat like Korea. After the harsh colonial French Master had been soundly defeated by the Vietnamese, two groups of people had two different ideologies. One group was the Vietcong, Vietnamese Communists who were located in North Vietnam. The other group supported the idea of Democracy, and were located in South Vietnam. Note: North Vietnam had finally won the Vietnam War in 1970s with the aid of China and USSR (Soviet Union.). The Americans lost because the troops were not willing to fight the war as Vietnam was far from US and the troops couldn't see the point of winning the war.
The Vietcong used songs and stories about heroism and sacrifice to motivate children to aid them in the war. They also employed the tactic of emphasizing the importance of defending their village and homeland against the perceived enemy, often portraying the American forces as invaders.