The 4th "Đồng Nai" Regiment (also known as the ''274 Viet Cong Main Force Regiment'' or ''VC 274th Regiment'' by the US and its allies ) was a

regiment A regiment is a military unit. Its role and size varies markedly, depending on the country, service and/or a specialisation. In Medieval Europe, the term "regiment" denoted any large body of front-line soldiers, recruited or conscript ...

of the

Viet Cong , , war = the Vietnam War , image = FNL Flag.svg , caption = The flag of the Viet Cong, adopted in 1960, is a variation on the flag of North Vietnam. Sometimes the lower stripe was green. , active ...

during the

Vietnam War The Vietnam War (also known by other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vietnam a ...

. The regiment was part of the VC

5th Division In military terms, 5th Division may refer to: Infantry divisions * 5th Division (Australia) *5th Division (People's Republic of China) * 5th Division (Colombia) *Finnish 5th Division (Continuation War) * 5th Light Cavalry Division (France) *5th Mo ...

and operated in the

Bien Hoa Bien may refer to: * Bien (newspaper) * Basic Income Earth Network * Bień, Poland {{disambiguation ...

, Đồng Nai, Phước Tuy and Long Khánh provinces, in what was known as the Hát Dịch Secret Zone. The Regiment consisted of a headquarters and three battalions (800, 265 and 308 Battalions). Each battalion of the regiment consisted of a HQ, three rifle companies and a heavy weapons company. The regiment consisted of about 1,500 men, recruited from outside the area of their operation supplemented by North Vietnamese Army regulars. Local Viet Cong elements acted as scouts during operations. The regimental HQ had eight supporting companies equipped with

82 mm mortars 8 (eight) is the natural number following 7 and preceding 9. In mathematics 8 is: * a composite number, its proper divisors being , , and . It is twice 4 or four times 2. * a power of two, being 2 (two cubed), and is the first number of t ...

, 12.7 mm heavy machine guns and 75 mm recoilless rifles and communications, transport, medical and engineer companies. The Regiment or its battalions participated in the battles of Suoi Chau Pha,

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and during

Operation Coburg Operation Coburg (24 January − 1 March 1968) was an Australian and New Zealand military action during the Vietnam War. The operation saw heavy fighting between the 1st Australian Task Force (1 ATF) and North Vietnamese People's Army of Vietna ...

against

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and

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forces, and the

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against the Army of the Republic of Vietnam. After the

Tet Offensive The Tet Offensive was a major escalation and one of the largest military campaigns of the Vietnam War. It was launched on January 30, 1968 by forces of the Viet Cong (VC) and North Vietnamese People's Army of Vietnam (PAVN) against the force ...

in 1968, the regiment left the 5th Division, stayed and operated in

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region, under direct command of Military Region 9.Major General Nguyen Hong Phuc
Website of 5th Division Veterans
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References

;Sources * * {{Refend Military units and formations of the Viet Cong Regiments of the People's Army of Vietnam