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Soon Le Duan became the acting 1st secretary replacing Truoung. Duan urged military line, increased assistance to insurgency, assassinated govt officials, but maintained status qua to schholteachers, health workers and agricultural officers.According to an estimate he assassinated 20 p.c. of South vietnam's village chiefs by 1958. In 1959, the North's Central Committee issued a secret circular authrizing an armed struggle. In may the South Vietnam Govt enacted a law which made political violence a punishable by death and property confiscated. Observing the increasing unpopularity of the Diem Govt. Hanoi created a National Liberation Front.At that time American administrator Mcnamara and other were posted in Vietnam. The communists got a popular support to replace Diem's Govt and reunify the country.