This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This article's lead section may be too short to adequately summarize the key points. Please consider expanding the lead to provide an accessible overview of all important aspects of the article. (November 2017) This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources.Find sources: "Operation Diamond Head" – news · newspapers · books · scholar · JSTOR (November 2017) (Learn how and when to remove this template message)
Operation Diamond Head
Part of Vietnam War

M113s of the 2nd Battalion, 22nd Infantry, 10 September 1967
Date11 July - 31 October 1967
Location
Tây Ninh Province, South Vietnam
Result U.S. claims operational success
Belligerents
 United States Vietnam North Vietnam
Commanders and leaders
MG John C. F. Tillson
Units involved
3rd Brigade, 25th Infantry Division 101st Regiment
165th Regiment
Casualties and losses
35 killed US body count: 136 killed

Operation Diamond Head was an operation conducted by the 3rd Brigade, 25th Infantry Division in Tây Ninh Province, lasting from 11 July to 31 October 1967.[1]: 367 

Prelude

In May 1967, U.S. intelligence located a People's Army of Vietnam (PAVN) supply base in the Angel's Wing area of Cambodia's Svay Rieng Province and learned that a two battalion attack would be made from this sanctuary into Tây Ninh Province in July.[1]

Operation

The operation commenced on 11 July with the 2nd Battalion, 12th Infantry Regiment and the 3rd Battalion, 2nd Infantry Regiment and 8 South Vietnamese Regional Force companies conducting sweeps between the Vàm Cỏ Đông River and the Cambodian border.[1]

On 14 July, South Vietnamese agents reported that the PAVN planned to attack Tây Ninh city and that night PAVN forces attacked positions between Tây Ninh and Dầu Tiếng District. The border sweeps were immediately cancelled and on 15 July the 2 Battalions, reinforced by the 2/22nd Infantry (Mechanized) moved to the scene of the attacks but the PAVN had fled. On 18 July a U.S. patrol engaged and killed several members of the PAVN 165th Regiment.[1]

The 2 Battalion attack never eventuated and the operation continued with only sporadic contact resulting in 61 PAVN and 31 U.S. killed by the end of August.[1]: 368 

On the night of 2 September, a PAVN force attacked a U.S. company's night defensive position destroying 2 M113s with Rocket-propelled grenades. On 4 September the same company engaged a PAVN force near Black Virgin Mountain losing 4 killed.[1]: 368 

In late September, the 2nd Battalion, 34th Armor Regiment joined the operation and were tasked with defending Tây Ninh Combat Base. The other Battalions swept the Michelin Rubber Plantation claiming to have killed 75 PAVN and locating several supply caches.[1]: 368 

During October, the 3rd Brigade formed a blocking force in the eastern Michelin Plantation while the 1st Infantry Division swept the Long Nguyen Secret Zone in Operation Shenandoah II.[1]: 368 

Aftermath

Operation Diamond Head officially concluded on 31 October and PAVN losses were 136 killed whereas U.S. losses were 35 killed.[1]: 385 

References

Public Domain This article incorporates public domain material from websites or documents of the United States Army Center of Military History.

  1. ^ a b c d e f g h i MacGarrigle, George (1998). Combat Operations: Taking the Offensive, October 1966 to October 1967. United States Army Center of Military History. ISBN 9780160495403.Public Domain This article incorporates text from this source, which is in the public domain.

Categories