12 miles south of Hue
The best way (other than the "Order of Battle Vietnam" book) is knowing what division it was assigned to. And divisions moved around a lot in South Vietnam; if the 158th was with the 101st Abn Div (Ambl) in '70, '71 then it was in I Corps at Phu Bai (which had Camp Eagle & Camp Evans as part of the Phu Bai command).
the US Army's 2nd maint bn was stationed at vung tau until aug 69 when it moved to I corps. HQ and main support co was stationed at the phu bai airport- which is now an international airport.
If Long An is in the old III Corp area (the old Military Region (MR) III) then it's within 50 miles of Saigon from any direction. Saigon was in III Corps. The Delta was IV Corps; Highlands II Corps, and Da Nang/Hue/Phu Bai/Quang Tri/Dong Ha was I Corps.
About 40 miles south of the DMZ
If the two sources named on the previous post don't work, then try the US Department of Defense, Vietnam War Service Index.
my lai
Phu Bai International Airport.
Phu Bai, located in Vietnam, was primarily home to the U.S. Army's 101st Airborne Division during the Vietnam War. Additionally, various support and logistical units operated in the area, including elements of the 1st Cavalry Division. The base served as a critical location for operations in the Hue-Phu Bai area and supported numerous combat and supply missions throughout the conflict.
Phu Bai Phu, Phugadi Phu
The 1st and 2nd (strike) battalions of the "O" Deuce (502nd) were at Phu Bai (I Corps) from '69/'70 until '72. They were spread out (putting out fires) in the southern portions of South Vietnam prior to those years.
The best way (other than the "Order of Battle Vietnam" book) is knowing what division it was assigned to. And divisions moved around a lot in South Vietnam; if the 158th was with the 101st Abn Div (Ambl) in '70, '71 then it was in I Corps at Phu Bai (which had Camp Eagle & Camp Evans as part of the Phu Bai command).
The nearest major airport is Phu Bai International Airport (HUI / VVPB). This airport has domestic flights and is about 13 km from the center of Hue, Viet Nam. Another major airport is Da Nang International Airport (DAD / VVDN), which has international and domestic flights from Danang, Viet Nam and is 79 km from Hue, Viet Nam.
the US Army's 2nd maint bn was stationed at vung tau until aug 69 when it moved to I corps. HQ and main support co was stationed at the phu bai airport- which is now an international airport.
In 1970, the 8th Radio Research Unit in Phu Bai, Vietnam, was commanded by Lieutenant Colonel William A. McClure. This unit played a crucial role in electronic warfare and intelligence gathering during the Vietnam War. McClure's leadership contributed to the unit's effectiveness in intercepting and analyzing enemy communications.
USN Seabees began operations in South Vietnam in 1954; USN mobile construction battalions consisted of about 24 officers and over 700 men and were primarily operating in I Corps (MR 1). They were primarily based at Da Nang, Hue, Phu Bai, Chu Lai, Quang Tri, and Dong Tam.
If Long An is in the old III Corp area (the old Military Region (MR) III) then it's within 50 miles of Saigon from any direction. Saigon was in III Corps. The Delta was IV Corps; Highlands II Corps, and Da Nang/Hue/Phu Bai/Quang Tri/Dong Ha was I Corps.
About 40 miles south of the DMZ