Final answer:
The program advised by Ngo Dinh Diem to keep out insurgents in villages was the Strategic Hamlet program.
Step-by-step explanation:
The program called for by Ngo Dinh Diem that advised villages to erect fences and barriers in order to keep out insurgents in the era of the Kennedy administration was the Strategic Hamlet program. This program aimed to move rural villagers into fortified compounds where they could be protected from Viet Cong attacks.
Learn more about Ngo Dinh Diem's program to keep out insurgents in villages