Includes over 10 maps and illustrations This monograph forms part of the Indochina Monograph series written by senior military personnel from the former Army of the Republic of Vietnam who served against the northern communist invasion. "The war in Vietnam was often called an intelligence war. The challenges and responsibilities placed on the South Vietnam-United States-Free World intelligence community were great and constant. During this long war the entire intelligence program improved each day as our data base expanded, as more was learned about the elusive enemy, personnel were trained, and new procedures and techniques were tested and found effective. The most rewarding experience in intelligence activities during the Vietnam war was the very close cooperation and coordination between American and Vietnamese military intelligence personnel and systems. It was this cooperation that helped RVNAF military intelligence upgrade and become self-reliant during the post-cease-fire period. This monograph attempts to record all the facts concerning intelligence activities, its organizations and coordination procedures, its successes and failures during the period from 1965 to the final days of the Republic of Vietnam. In this attempt, one of the difficulties I faced was the lack of documentation to help make my work more accurate and more substantial. To overcome this shortcoming, I have interviewed several former colleagues of mine, American and Vietnamese, all of them highly experienced with intelligence activities in Vietnam. Apart from their invaluable contributions, most of the writing was based on my personal knowledge and experience."-Author's Preface.
