None of the people's wars of the sixties did very well, including the one in Vietnam. Vo Nguyen Giap himself has admitted a loss of 600,000 men between 1965 and 1968...Moreover, by about 1970 at least 80% of the day-to-day combat in South Vietnam was being carried on by regular NVA troops...Genuine black-pajama southern guerrillas had been decimated and amounted to no more than 20% of the communist fighting forces.