Title: War zone C
Content:   War Zone C was the area in South Vietnam centered around the abandoned town of Katum near the Cambodian border where there was a strong concentration of People's Army of Vietnam (PAVN) and Viet Cong (VC) activity during the Vietnam War. This area war reportedly the general location of COSVN, the headquarters for communist military and political activities in the southern half of Vietnam.
Title: War Zone D
Content:   War Zone D was the area in South Vietnam around the Dong Nai River, north of Bien Hoa which served as a Viet Cong (VC) and People's Army of Vietnam (PAVN) base area and infiltration route during the Vietnam War.
Title: Việt Bắc
Content:  Việt Bắc (Northern Vietnam) is a region of Vietnam north of Hanoi that served as the Việt Minh's base of support during the First Indochina War (1946–1954). Việt Bắc is also called the capital of northernmost Vietnam because this area was the location of the headquarters of the Communist Party of Vietnam at the period before the rising against French domination in 1945, and the location of the headquarters of the Việt Minh government during the war of resistance against the French colonialists.
Title: History of guerrilla warfare
Content:  The Cu Chi Tunnels (Ðịa đạo Củ Chi) was a major base for guerrilla warfare during the Vietnam War. Located about 60 km northwest of Saigon (Ho Chi Minh City), the Viet Cong (NLF) used the complex system tunnels to hide and live during the day and come up to fight at night. Throughout the Vietnam War, the Communist Party closely supervised all levels of the conflict. The bulk of the VC/NLF were initially southerners, with some distinctive southern issues and sensibilities. Nevertheless, the VC/NLF was associated with the Northern Lao Dong Party which furnished it with supplies, weaponry and 
Title: Viet Cong
Content:  unified communist party headquarters for the South. COSVN was initially located in Tây Ninh Province near the Cambodian border. On July 8, the Viet Cong killed two U.S. military advisors at Biên Hòa, the first American dead of the Vietnam War. The "2d Liberation Battalion" ambushed two companies of South Vietnamese soldiers in September 1959, the first large unit military action of the war. This was considered the beginning of the "armed struggle" in communist accounts. A series of uprisings beginning in the Mekong Delta province of Bến Tre in January 1960 created "liberated zones", models of Viet Cong-style government. Propagandists celebrated their creation of battalions of 
Title: War zone C
Content:  War Zone C, located in the area designated as III Corps, was a section of South Vietnam with high strategic value due to its location in between Cambodia and Saigon as well as the fact that it was a popular jump off spot for PAVN/VC forces and supplies from the Ho Chi Minh Trail. War Zone C’s boundaries followed the Cambodian border to the north and west, while its eastern boundary ran parallel to Highway 13. The area included portions of Tay Ninh province, Binh Long province, and Binh Duong province. The area has been described as pathless jungles through mountainous regions and boggy swamps which made travel and transportation extremely difficult.
Title: Central Office for South Vietnam
Content:  During the early 1960s, COSVN was located South Vietnam's Tây Ninh Province, northwest of Saigon near the Cambodian border. During the period 1965–1970, the headquarters was in and around the Cambodian Mimot plantation, in what was called the "Fishhook" area on the Vietnamese/Cambodian border north of Tây Ninh and west of Lộc Ninh. During the Cambodian Campaign of 1970, COSVN moved westward to the area around Kratié. This was confirmed by first-person testimony provided to staff from the Cambodia-based media production group Camerado in 2008, during research for the motion picture Freedom Deal, which dramatizes the 1970 Cambodian Incursion from the point of view of the Cambodian people. A Cambodian community in the vicinity of Phnom Sambok, North of Kratié town, confirmed the location of staging areas for "large numbers of North Vietnamese vehicles and numerous structures" in the nearby forest. A Time magazine article in 1970 reported that rather than being a jungle Pentagon as often conceived, "COSVN is actually a staff of some 2,400 people who are widely dispersed and highly mobile", traveling between various bunkers and meeting places by bicycle and motorbike.
Title: Hát Dịch
Content:  Hát Dịch secret zone (mật khu Hát Dịch, chiến khu Hát Dịch) was an area within South Vietnam. It covered the area where the borders of Phước Tuy, Long Khánh and Biên Hòa Provinces met (today in Đồng Nai and Bà Rịa–Vũng Tàu Provinces). During the Vietnam War, the area was the headquarters for the Viet Cong (VC) 274th Regiment and was known as the Hat Dich secret zone and Base Area 301. From Hát Dịch, the VC could harass Highway 1, the main supply route between Biên Hòa and Xuân Lộc District and all points further north. They could also interdict Highway 15 
Title: G.I. Coffeehouses
Content:  The area around Seattle and Tacoma, Washington was profoundly impacted by the Vietnam War. In addition to the nearby Fort Lewis army base, there were McChord Air Force Base, Fort Lawton army base, Pier 91 Naval Station, Sand Point Naval Air Station, and the Puget Sound Naval Shipyard. Fort Lewis alone processed the induction of 2.3 million soldiers between 1966 and 1972, and became the army's central training ground for Vietnam combat, complete with a 15,000-acre mock Vietnam village containing thatched-roof structures, hidden tunnels, and play-acting "Viet Cong." As a result, the antiwar movement in the area also expanded in tandem with its growth throughout the U.S. In the fall of 1968, various antiwar, student and radical activists formed the GI-Civilian Alliance for Peace (GI-CAP), which, in conjunction with the military's concentration in the area, convinced 
Title: Battle of Hat Dich
Content:  of its proximity to Saigon, as well as the important South Vietnamese and US base areas in the Long Binh−Bien Hoa complex. The VC had been using the northern border regions—including the Thua Tich and Courtenay Rubber Plantation—to link their base areas in the Mây Tào Mountains in the north-east with the sparsely populated, but heavily vegetated Hat Dich area in the west. Over time, Australian operations in these areas usually resulted in contacts with varying size groups, including VC Main Force and occasionally PAVN units, and ultimately led to the destruction of their transit and training camps, as well as a series of bunker systems and logistic storage facilities.

Question: where was the vietnam war location?
Answer: South Vietnam.