Operation Prairie II

Operation Prairie II was a U.S. military operation in Quảng Trị Province, South Vietnam that sought to eliminate People's Army of Vietnam (PAVN) forces south of the Demilitarized Zone (DMZ) that took place from 1 February to 18 March 1967.


Operation Prairie II was essentially a continuation of the just-concluded Operation Prairie in the same tactical area of operations (TAOR). 3rd Marine Division deputy commander BG Michael P. Ryan was given responsibility for the area and he controlled 3 infantry battalions, 2 reconnaissance companies and artillery and other supporting units. Only 1 infantry battalion was available at any time for mobile operations with the other two battalions occupied with defending the large Marines bases along Route 9.[3]:9


A PAVN soldier surrenders to Company A, 1/9 Marines, 3 March 1967

The first few weeks of the operation saw little PAVN activity, however PAVN infiltration across the DMZ increased during the Tết ceasefire from 8 to 12 February. On 25 February Marine artillery carried out Operation Highrise, bombarding PAVN within and north of the DMZ. The PAVN responded on 27 February with an intensive bombardment of Con Thien and Firebase Gio Linh.[3]:9

On the morning of 27 February a Marine reconnaissance patrol operation 5km northwest of Cam Lộ Combat Base attempted to ambush 2 PAVN soldiers, however the soldiers were the lead elements of a company from the 812th Regiment, 324B Division which quickly surrounded the Marines who then called for support. Company L, 3rd Battalion, 4th Marines patrolling with 2 M48 tanks north of Cam Lộ was sent to support the patrol but were delayed by thick jungle and then were engaged by PAVN as they crossed a stream, following that engagement one of the tanks lost a track and Company L formed a defensive perimeter. Company G, 2nd Battalion, 3rd Marines was then deployed from Camp Carroll to assist the reconnaissance Marines and they were finally able to link up with them at 23:40.[3]:10-11

At 06:30 on 28 February the PAVN hit Company L, 3/4 Marines night defensive position with over 150 82mm mortar rounds followed by a ground assault hitting 3 sides of the perimeter. RPG-2 rounds hit both tanks but they remained in operation and by 09:00 Company L had repulsed 3 assaults. Company F, 2/3 Marines was sent from Camp Carroll to reinforce Company L and joined up with them at 10:30. Company L had lost 4 Marines killed and 34 wounded in the morning's attacks. Company G and the reconnaissance patrol were then ordered into blocking positions on Hill 124 (16°50′02″N 106°56′56″E / 16.834°N 106.949°E) and at 10:35 as they moved up the hill Company G was engaged on both sides by entrenched PAVN in a battle that lasted into the afternoon with Company G losing 7 Marines killed.[4] At 14:30 Company M, 3/4 Marines was landed on Hill 162 (16°50′46″N 106°56′35″E / 16.846°N 106.943°E) north of Hill 124 and moved south to link up with Company G meeting no opposition.[4]:5-227 At 14:30 the 2/3 Marines command group and Company F moved from the Company L position towards Hill 124 immediately triggering a PAVN ambush and at 15:10 the 2/3 Marines commander Lt Col. Victor Ohanesian ordered a withdrawal, he would be mortally wounded as he tried to evacuate a wounded Marine and the battalion operations officer Maj. Robert Sheridan, although wounded himself, took command of the column and organized its withdrawal back to the Company L position. Marine PFC James Anderson Jr. would later be posthumously awarded the Medal of Honor for his actions during this ambush. The PAVN then attacked the Marine perimeter but were repulsed by tank fire, however the PAVN kept up a steady bombardment of the position which prevented MEDEVAC helicopters from landing to evacuate the wounded.[3]:11-3

Lt Col. Earl DeLong was given command of 2/3 Marines to replace the wounded Ohanesian but was unable to land at the perimeter due to the intense fire and returned to Cam Lộ where he took command of Company F, 2nd Battalion, 9th Marines which marched to the 2/3 Marines perimeter, arriving at 03:40 on 1 March. At midday Company G 2/3 Marines and Company M, 3/4 Marines arrived at the 2/3 Marines position and they swept the surrounding area, but the PAVN had withdrawn. Later that day 1st Battalion, 9th Marines was landed at Hill 162 and began sweeping north, while the 3rd Battalion, 3rd Marines moved northwest from Cam Lộ in an attempt to squeeze any PAVN between them and the 1/9 Marines.[3]:13-4

On 3 March aerial reconnaissance spotted 3 large groups of PAVN moving towards the DMZ carrying bodies. Air and artillery strikes were called in and 1/9 Marines searched the area after the bombardment claiming to have found more than 200 PAVN dead.[3]:14

On 7 March the PAVN hit Camp Carroll with over 400 mortar rounds causing little damage.[3]:14

The Marines saw little action for the rest of the operation, sweeps uncovered more PAVN. In mid-March an Army of the Republic of Vietnam Airborne unit engaged a PAVN unit southeast of Con Thien, killing over 250 PAVN.[3]:14


Operation Prairie II concluded on 18 March, the Marines had lost 93 killed, 483 wounded and claiming 694 PAVN killed and 20 captured.[3]:14 137 individual weapons were recovered during the campaign[5]. The operation proceeded to Operation Prairie III.


 This article incorporates public domain material from websites or documents of the United States Marine Corps.

  1. ^ https://www.vietnam.ttu.edu/reports/images.php?img=/images/1201/1201064133.pdf
  2. ^ https://www.vietnam.ttu.edu/reports/images.php?img=/images/1201/1201064133.pdf
  3. ^ a b c d e f g h i Telfer, Gary (1984). U.S. Marines in Vietnam: Fighting the North Vietnamese 1967 (Marine Corps Vietnam Operational Historical Series). History & Museums Division, United States Marine Corps. ISBN 9781787200845. This article incorporates text from this source, which is in the public domain.
  4. ^ a b Kelley, Michael (2002). Where we were in Vietnam. Hellgate Press. p. 5–226. ISBN 978-1555716257.
  5. ^ https://www.vietnam.ttu.edu/reports/images.php?img=/images/1201/1201064133.pdf
3rd Battalion, 4th Marines

3rd Battalion, 4th Marines (3/4) is an infantry battalion of the United States Marine Corps. Nicknamed "Thundering Third". The most recent leader Lt. Col. Birchfield III, J. W. radio callsign is "Darkside". They are based at the Marine Corps Air Ground Combat Center, Twentynine Palms, California, and consist of approximately 1,000 Marines. The unit currently falls under the command of the 7th Marine Regiment, 1st Marine Division, but — along with its two sister battalions — is hosted by the 3rd Marine Division, at Camp Schwab in Okinawa, Japan, when training in jungle warfare. The 3rd falls under the 4th Marine Regiment at such times.

Cam Lộ Combat Base

Cam Lộ Combat Base (also known as Hill 37 or simply Cam Lộ) is a former U.S. Marine Corps, U.S. Army and Army of the Republic of Vietnam (ARVN) base northwest of Quảng Trị in central Vietnam.

James Anderson Jr.

Private First Class James Anderson Jr. (January 22, 1947 – February 28, 1967) was a United States Marine who posthumously received the Medal of Honor for heroism while serving in Vietnam in February 1967. When his Medal of Honor was awarded on August 21, 1968, he became the first African-American U.S. Marine recipient of the Medal of Honor.

List of allied military operations of the Vietnam War (1967)

This article is a list of known military operations of the Vietnam War in 1967, conducted by the armed forces of the Republic of Vietnam, the United States and their allies.

List of allied military operations of the Vietnam War (M–S)

This article is a list of known military operations of the Vietnam War, a war fought by the United States to try to stop communism in Southeast Asia, conducted by the armed forces of the Republic of Vietnam, the United States and allies consisting of Australia, New Zealand, Thailand, South Korea, and the Philippines. This is not a complete list. Operations are currently listed alphabetically, but are being progressively reorganised as a chronology.

Operation Prairie

Operation Prairie was a U.S. military operation in Quảng Trị Province, South Vietnam that sought to eliminate People's Army of Vietnam (PAVN) forces south of the Demilitarized Zone (DMZ). Over the course of late 1965 and early 1966 the Viet Cong (VC) and the PAVN intensified their military threat along the DMZ. The tactical goal of these incursions was to draw United States military forces away from cities and towns. Operation Hastings, a series of actions in defense of the DMZ, lasted from 15 July to 3 August 1966. It was considered a strategic success. Operation Prairie was conceived as a larger, longer mission covering the same areas along the DMZ.

It commenced on 3 August 1966 and lasted for six months. The majority of the activities were conducted by the 3rd Marine Division in the Con Thien and Gio Linh regions with the main objective of stopping the PAVN 324B Division from crossing the demilitarized zone and invading Quang Tri Province.

Various units engaged in fiercely fought actions during the operation, usually supported by a mixture of artillery, air and helicopter gunship support, sometimes including B52 strategic bombers. By November the 324B Division had been withdrawn after heavy losses. It was replaced by other PAVN units, but these remained inactive.

The operation was considered highly successful by the Americans. They had lost 226 Marines killed against estimated PAVN of over 1,700 dead or captured and suppressed PAVN activity. However, the PAVN strategy had tied down large numbers of US troops in the area south of the DMZ, leaving population centers under-protected.

Operation Prairie III

Operation Prairie III was a U.S. Marine Corps operation in Quảng Trị Province, South Vietnam that sought to eliminate People's Army of Vietnam (PAVN) forces south of the Demilitarized Zone (DMZ) that took place from 19 March to 19 April 1967.

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