Operation Union II

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Coordinates: 15°37′49″N 108°15′54″E / 15.6303°N 108.265°E / 15.6303; 108.265
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Operation Union II
Part of
Quang Tin provinces, South Vietnam
Result U.S./South Vietnamese claim victory
Belligerents  United States
 South Vietnam (withdrew May 30)  North VietnamCommanders and leaders United States Colonel Kenneth J. Houghton UnknownUnits involved
5th Marine Regiment
South Vietnam 6th Regiment
South Vietnam 1st Ranger Group
2nd DivisionCasualties and losses United States 110 killed[1] US body count: 701 killed
23 captured

Operation Union II was a

5th Marine Regiment. Launched on 26 May 1967 the operation ended on 5 June. U.S. reported the People's Army of Vietnam
(PAVN) lost 701 killed and 23 captured, while U.S. casualties were 110 killed and 241 wounded.

Background

The Quế Sơn Valley is located along the border of

MACV). The 1st Battalion, 5th Marines and 3rd Battalion, 5th Marines, experienced units, that had fought in South Vietnam since their arrival in the summer of 1966, were assigned to the valley in 1967 to support the outnumbered the Army of the Republic of Vietnam
(ARVN) forces in the area.

During Operation Union from 21 April to 16 May, the 3rd Battalion, 1st Marines had fought the PAVN 21st Regiment near the Marine outpost on Loc Son Mountain for control of the southern part of the Quế Sơn Valley. Operation Union II was launched on 26 May to destroy the withdrawing remnants of the PAVN with a helicopter assault by the 5th Marine Regiment, commanded by Colonel Kenneth J. Houghton. The assault was coordinated with ground attacks by the ARVN 6th Regiment, 2nd Division and the 1st Ranger Group.

Prelude

The plan called for 1/5 Marines, commanded by Lieutenant Colonel Hilgartner, to establish blocking positions in the western portion of the valley while the 3/5 Marines, commanded by Lieutenant Colonel Esslinger, was to make a heliborne assault into the southern part of the valley and sweep northeast. Meanwhile, the three battalions of the ARVN Ranger Group would attack southwest from Thang Binh, while two units of the 6th Regiment attacked northwest from a position near Tam Kỳ. The ARVN named their participation Operation Lien Ket 106.[2]: 68 

Operation

5th Marines cross rice paddies in search of enemy snipers

The operation began the morning of 26 May with the 1/5 Marines and ARVN troop movements proceeding as planned. 3/5 Marines, composed of three infantry companies, one weapons company and a command group, was carried by helicopters to Landing Zone (LZ) Eagle (15°37′49″N 108°15′54″E / 15.6303°N 108.265°E / 15.6303; 108.265), an area 5 km east of the Loc Son outpost. The first two waves to arrive at the LZ experienced only light small arms fire, but as the bulk of the battalion landed the LZ was subjected to heavy weapon and mortar fire. At 11:34 the enemy defenders shot down a CH-46A Sea Knight over the LZ. An attack by Companies L and M launched to relieve the pressure on the LZ found a well-entrenched PAVN force, identified as being elements of the PAVN 3rd Regiment, northeast of the LZ.[2]: 68 

Supported by artillery and air strikes, Company I enveloped the PAVN's flank, and the Marines soon gained the upper hand. By late afternoon the Marines had overrun the last PAVN positions, counting PAVN 118 dead for Marine losses of 38 killed and 82 wounded.[2]: 68–70 

The Marine and ARVN forces swept the area for the next three days but contacts declined as the PAVN withdrew from the area. Concluding that the enemy had been routed, the ARVN ended their part of the operation.[2]: 70 

Houghton however was not convinced and responding to intelligence reports, he directed the 5th Marines to continue sweeping the region. On the morning of 2 June the Regiment was sweeping toward the Vinh Huy Village complex (15°38′28″N 108°17′10″E / 15.641°N 108.286°E / 15.641; 108.286).

rice paddy. Caught in a crossfire the Marines were pinned down and consolidated their positions while calling artillery and air strikes on enemy positions. During heavy fighting Company F, commanded by Captain James A. Graham, was decimated. Captain Graham was awarded a posthumous Medal of Honor for defending to the last his company's dead and wounded.[2]: 71–2 [3]

At 14:20 Houghton called for the commitment of the

Medevac choppers, but all requests were denied because of the extreme darkness. However a CH-53 helicopter that had just dropped off the Company E, 2/7 Marines at the original landing zone heard the desperate call and was guided in to the landing zone directly in the middle of the battlefield. When the helicopter returned to Da Nang Air Base, it was noted that it had received a total of 57 holes in its sides from the exploding mortar rounds and automatic weapons fire during the battlefield landing. The sudden presence of the strong Division Reactionary Force on its northern flank caused the PAVN units to disengage and make a hasty withdrawal to the southwest, but the move proved costly to them. Once the PAVN soldiers left the protection of their fortifications, they were easy targets for the Marines supporting arms fire.[2]
: 72–3 

The arrival of the Marine reinforcements on its northern flank prompted the PAVN forces to attempt a hasty withdrawal during the night, exposing themselves to Marine supporting arms fire. Meanwhile, the 5th Marines regrouped and evacuated casualties. The Marines themselves suffered 71 killed and 139 wounded in the battle. The following morning, when the battalions swept the battle area, 476 PAVN dead were counted in and around the contested rice paddy and its formidable hedgerow complex and 31 weapons were captured. The PAVN and Marines held an undeclared ceasefire which they each retrieved their dead from the battlefield.[2]: 73–4 

Aftermath

The action of 2–3 June marked the last significant battle of Operation Union II. The Marines claimed PAVN casualties were 701 killed and 23 captured, a favorable ratio to 110 Marines killed and 241 wounded. For actions in both Union I and Union II the 5th Marines and all units under its operational control, including the division reactionary force companies of Company D, 1/7 Marines and Company E, 2/7 Marines received the

Lyndon Johnson.[2]
: 74 

For three months, the PAVN 2nd Division was no longer an effective fighting force.[4]

References

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

  1. ^ "Operation Union II - Declassified" (PDF). Virtual.vietnam.ttu.edu. Retrieved 2 December 2014.
  2. ^
    ISBN 978-1494285449.Public Domain This article incorporates text from this source, which is in the public domain
    .
  3. ^ "Operations". Securenet.net. Retrieved 2 December 2014.
  4. ^ "Operation UNION and UNION II". Combatwife.net. Retrieved 2 December 2014.

External links

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