What did south vietnam need us assistance in the early 1960s

In 1960, the oft-expressed optimism of the United States and the Government of South Vietnam that the Viet Cong were nearly defeated proved mistaken. Instead the Viet Cong became a growing threat and security forces attempted to cope with Viet Cong attacks, assassinations of local officials, and efforts to control villages and rural areas.

sumerians were responsible.

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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