VIETNAM STUDIES

THE WAR IN THE NORTHERN PROVINCES
1966-1968

Cover: The War in the Northern Provinces

by
Lieutenant General Willard Pearson

DEPARTMENT OF THE ARMY
WASHINGTON, D.C., 1975


Library of Congress Catalog Number: 75-23360
First Printing

For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402


Foreword

The United States Army has met an unusually complex challenge in Southeast Asia. In conjunction with the other services, the Army has fought in support of a national policy of assisting an emerging nation to develop governmental processes of its own choosing, free of outside coercion. In addition to the usual problems of waging armed conflict, the assignment in Southeast Asia has required superimposing the immensely sophisticated tasks of a modem army upon an underdeveloped environment and adapting them to demands covering a wide spectrum. These involved helping to fulfill the basic needs of an agrarian population, dealing with the frustrations of antiguerrilla operations, and conducting conventional campaigns against well-trained and determined regular units.

Although this assignment has officially ended, the U.S. Army must prepare for other challenges that may lie ahead. While cognizant that history never repeats itself exactly and that no army ever profited from trying to meet a new challenge in terms of the old one, the Army nevertheless stands to benefit immensely from a study of its experience, its shortcomings no less than its achievements.

Aware that some years must elapse before the official histories will provide a detailed and objective analysis of the experience in Southeast Asia, we have sought a forum whereby some of the more salient aspects of that experience can be made available now. At the request of the Chief of Staff, a representative group of senior officers who served in important posts in Vietnam and who will carry a heavy burden of day-to-day responsibilities has prepared a series of monographs. These studies should be of great value in helping the Army develop future operational concepts while at the same time contributing to the historical record and providing the American public with an interim report on the performance of men and officers who have responded, as others have through our history, to exacting and trying demands.

All monographs in the series are based primarily on official records, with additional material from published and unpublished secondary works, from debriefing reports and interviews with key participants, and from the personal experience of the author. To

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facilitate security clearance, annotation and detailed bibliography have been omitted from the published version; a fully documented account with bibliography is filed with the U.S. Army Center of Military History.

The reader should be reminded that most of the writing was accomplished while the war in Vietnam was at its peak, and the monographs frequently refer to events of the past as if they were taking place in the present.

The author of this monograph, Lieutenant General Willard Pearson, played a significant role in the events he so graphically describes. During the Tet offensive of 1968 he organized a MACV Forward Command Post and directed its deployment to Phu Bai in the I Corps Tactical Zone. He later served as Deputy Commander and Chief of Staff of XXIV Army Corps, an enlarged and reorganized outgrowth of MACV Forward. In 1966, on an earlier tour of duty in Vietnam, General Pearson commanded the 1st Brigade of the 101st Airborne Division. Under General Pearson's command, the brigade saw action in ten different provinces and earned a Presidential Unit Citation. A veteran of World War II and the Korean conflict, General Pearson is presently Superintendent of the Valley Forge Military Academy and Jr. College, Wayne, Pennsylvania.

15 March 1974
Washington, D.C.

VERNE L. BOWERS
Major General, USA
The Adjutant General

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Preface

The North Vietnamese Army units deployed just north of the demilitarized zone in 1966 posed a serious and continuing threat to the security of Quang Tri and Thua Thien, the two northernmost provinces of South Vietnam. This is an account of the North Vietnamese attempts to seize control of these two provinces and of the response of the Free World Military Assistance Forces. The period covered by this narrative is from the spring of 1966 to the spring of 1968 and is the story, primarily, of U.S. Army units.

Particular appreciation is due Major John F. Reid, Infantry, who researched and compiled the initial draft of the narrative and Specialist 7 Gary L. Neal, who was the author's stenographer during the critical months of the Tet offensive at Phu Bai in February and March 1968 and who four years later typed the final draft for the author at Headquarters, V Corps, Frankfurt, Germany.

Wayne, Pennsylvania
15 March 1974

WILLARD PEARSON
Lieutenant General, US Army

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Contents

Chapter

Page

I. EARLY DEVELOPMENTS

3

Background

3

The Northern Border, 1965-1967

6

Continuing Activity Along the Demilitarized Zone

15

II. PREPARING FOR A SHOWDOWN

21

The Anti-Infiltration System

21

Free World Forces

24

The Growth of Logistic Facilities

26

Upgrading of the Vietnamese Army Forces

28

III. THE BLEAK PICTURE

29

Operation Niagara

31

The Battle of Khe Sanh—Opening Round

32

The Tet Offensive—First Phase

37

The Battle for Hue

39

Intelligence

48

Battle for Quang Tri

50

Enemy Attacks on the Logistical System

57

Task Force Clearwater

62

IV. U.S. RESPONSE TO THE TET OFFENSIVE

66

Planning for the Relief of Khe Sanh

68

Single Manager for Air Concept

71

V. KHE SANH AND PEGASUS

73

Planning for Pegasus

78

Operation Orders

79

VI. THE FREE WORLD COUNTEROFFENSIVE

81

Opening Operations

81

Back to A Shau

89

VII. ANALYSIS OF NORTH VIETNAMESE GOALS AND FAILURES

93

Intelligence

97

Organization for Combat

98

Airmobility

101

Superior Firepower

101

Communications

102

Logistics

102

Improvement of Vietnamese Armed Forces

103

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Chapter

Page

The Other War

105

Conclusion

107

GLOSSARY

108

Charts

No.

Page

1. U.S. Marine and Popular Forces Combined Action Platoon Organization Headquarters

25

2. Khe Sanh Task Force-January-March 1968

36

3. 1st Air Cavalry Division Organization for Operation PEGASUS

82

4. Buildup of Opposing Maneuver Battalions in I Corps Tactical Zone

98

5. Subordinate Units to 3d Marine Amphibious Force

100

6. I Corps Vietnamese Organization

104

Diagrams

1. Linear Obstacle

22

2. Sample Tactical Application

24

Maps

1. I Corps Tactical Zone

5

2. Northern Quang Tri Province

10

3. Hill Fight Area

16

4. Hill Fights, April-May 1967

17

5. Enemy Operations-Khe Sanh, December 1967-January 1968

33

6. The Battle of Hue—Enemy Attack, 30-31 January 1968

39

7. The Battle of Hue—Friendly Situation, 24-25 February 1968

42

8. The Battle of Quang Tri City—Enemy Attack, 31 January 1968

52

9. The Battle of Quang Tri City—Counterattack, 31 January-1 February 1968

54

10. The Battle of Lang Vei—Enemy Attack, 7 February 1968

74

11. Relief of Khe Sanh—Operation PEGASUS, 1 April 1968

84

12. Relief of Khe Sanh—Operation PEGASUS, 2-4 April 1968

86

13. Relief of Khe Sanh—Operation PEGASUS, 5-6 April 1968

87

14. Relief of Khe Sanh—Operation PEGASUS, 7-8 April 1968

88

15. The Battle of A Shau Valley—Friendly Situation, 19 April-12 May 1968

90

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Illustrations

 

Page

Aerial View of A Shau Special Forces Camp

7

175-mm. Gun

11

Headquarters, Task Force Oregon, at Chu Lai

12

Aerial View of Khe Sanh in Quang Tri

19

Balance Pressure Sensor System

23

Aerial View of Highway North of Da Nang

27

Aerial View of Section of Citadel Wall in Hue

38

Aerial View of Ruins of Hue

48

Aerial View of Quang Tri

51

UH-1B Gunship of 1st Cavalry Division

56

U.S. Engineers Repairing Approach to Bridge

57

A LARC-5 Comes Ashore

60

LARC-5 Operators Off Wunder Beach

61

Cargo Craft and Patrol Boat

62

River Patrol Boat

63

Landing Craft, Medium

64

The 1st Cavalry Division Disembarks From UH-1 for a Mission

83

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