May 31, 1965 – This Day During The Vietnam War – Battle of Ba Gia

May 31, 1965 – The Battle of Ba Gia was a major battle that marked the beginning of the Viet Cong’s (VC) Summer Offensive of 1965, during the early phases of the Vietnam War, known in Vietnam as the American War. The battle took place in Quảng Ngãi Province, South Vietnam, between May 28–31, 1965.
Following the victory of VC forces in the Battle of Binh Gia earlier in the year, the North Vietnamese leadership in Hanoi decided to intensify their war effort in order to defeat the American-backed Government of South Vietnam. The North Vietnamese war effort received a major boost in the first half of 1965, when the Soviet Union and the People’s Republic of China stepped up the delivery of military aid, which included the deployment of military specialists and other personnel to train North Vietnam’s armed forces. The North Vietnamese decision to intensify the war culminated in the Summer Offensive of 1965, which aimed to destroy the regular divisions of the Army of the Republic of Vietnam (ARVN) in large-scale battles, and pin down the elite units of the ARVN strategic reserve. In Quảng Ngãi Province, South Vietnam, the VC kick-started their summer campaign by attacking elements of the ARVN 51st Infantry Regiment during the early hours of May 29, 1965. In the days that followed, the VC destroyed an entire ARVN Task Force to mark a successful start to their summer campaign.
On the night of May 28, 1965, the VC marched into their designated positions around Ba Gia; the 90th Battalion took up their position at Minh Thanh, the 60th Battalion at Vinh Loc 1, the 40th Battalion at Duyen Phuoc, and the 45th Battalion at Vinh Khanh. The 271st Regimental Headquarters set up camp at Nui Thanh, while the 83rd Local Force Battalion was ordered to encircle the administrative centre at Nghia Hanh. At 5.45 am on May 29, elements of the VC 271st Regiment launched a surprise attack on Phuoc Loc, a small village located south of Ba Gia. Within 10 6hminutes of fighting, the two platoons of South Vietnamese Regional Force defending Phuoc Loc were subdued, and the VC quickly consolidated the battlefield around the area. At around 6:00 am ARVN Captain Nguyen Van Ngoc, commander of the 1st Battalion, 51st Infantry Regiment, led his unit from Go Cao south toward Phuoc Loc to stage a counter-attack against the lead element of the enemies’ 271st Regiment.
At 9.50 am, as the ARVN 1st Battalion marched through Loc Tho village they were encircled by the VC 90th Battalion, who had set up ambush positions and were waiting for the ARVN to arrive. Caught by surprise, the ARVN 1st Battalion descended into chaos and was unable to mount an effective counter-attack. In less than one hour of fighting, the battalion was completely destroyed with 270 soldiers either killed or wounded. Captain Nguyen Van Ngoc was amongst the 217 men who were captured. Only 65 ARVN soldiers and three American advisors managed to return to government lines.[14] The VC also claimed to have destroyed one 105mm artillery piece, four GMC trucks and one Jeep. Meanwhile, the VC 83rd Local Force Battalion marched from Tra Khuc River toward Nghia Hanh, and began applying pressure on the ARVN stationed there. Thus, the VC were asserting control over Ba Gia and the surrounding areas.
On the afternoon of May 29, ARVN General Nguyễn Chánh Thi, commander of South Vietnam’s I Corps Tactical Zone, responded to the VC assault by forming a Task Force with the objective of recapturing Ba Gia. The Task Force consisted of the 2nd Battalion, 51st Infantry Regiment, the 3rd Marine Battalion, the 39th Ranger Battalion and one squadron of M113 armored personnel carriers. According to General Nguyen Chanh Thi’s plan, the Task Force would achieve the following objectives: the 3rd Marine Battalion would advance along Route 5 toward the objective of Ba Gia; the 39th Ranger Battalion through An Thuyet, Vinh Loc and Vinh Khanh and than capture Mount Chop Non; and the 2nd Battalion, 51st Infantry Regiment towards Phuoc Loc and capture Mount Ma To. On the morning of May 30 the South Vietnamese Task Force assembled in Quang Ngai City and waited for further orders, while ARVN artillery and U.S. Air Force fighter-bombers pounded VC positions around Ba Gia.
At around 12 noon on May 30, with extensive air support from U.S. fighter-bombers and UH-1 helicopter gunships, the ARVN advanced towards their objectives in two separate columns. In the first, the ARVN 39th Ranger Battalion approached northern Phuoc Loc to secure Mount Chop Non, from where they could strike at the VC’s southern flank. In the second column the ARVN 2nd Battalion and the 3rd Marine Battalion advanced towards their objectives of Mount Ma To and Ba Gia respectively. However, South Vietnamese manoeuvres on the ground did not go unnoticed, because VC reconnaissance teams on Mount Khi had spotted the columns and responded accordingly. Elements of the VC 45th Battalion were ordered to set up ambush positions inside the village of Vinh Khanh, while the 60th Battalion was redeployed to Mount Ma To and waited for the enemy there. At about 1 pm the ARVN 2nd Battalion, 51st Infantry Regiment arrived on Hill 47 in the vicinity of Mount Ma To, but the VC 60th Battalion allowed them to advance toward their objective.
Meanwhile, the ARVN 39th Ranger Battalion secured their objective on Mount Chop Non, with the main formation of the VC 45th Battalion lining their troops on the rear positions of the ARVN Rangers. At 2:05 pm the VC unleashed their ambush on the ARVN 2nd Battalion, forcing the ARVN infantrymen to fight for their lives. As fighting erupted on Mount Ma To, the ARVN 3rd Marine Battalion inside the village of Phuoc Loc was ordered to relieve the 2nd Battalion. However, by 3:30 pm the 3rd Marine Battalion was also surrounded by the VC 60th Battalion on Hill 47, which had moved out from Vinh Loc village to engage the Marines. At the same time, VC mortar fire began slamming into South Vietnamese positions in the village of Phuoc Loc, and fighting continued until 5 pm. When it concluded that evening both sides had suffered heavy casualties and the South Vietnamese 2nd Battalion and the 3rd Marine Battalion were forced to retreat back to Phuoc Loc with four M-113 APCs providing fire support.
During the night of May 30, VC formations on the battlefield were ordered to wipe out what was left of the South Vietnamese Task Force in Phuoc Loc village, as local villagers in Ba Gia helped the VC round up South Vietnamese prisoners. On Mount Chop Non, the VC 45th Battalion were able to advance within 100 metres of the ARVN 39th Ranger Battalion’s line of defence without being noticed. In the early hours of May 31, the VC 40th Battalion resumed its attack on South Vietnamese positions in Phuoc Loc, but the ARVN 2nd Battalion and 3rd Marine Battalion put up stiff resistance. After several hours of fierce fighting, the VC recaptured Phuoc Loc where they found the bodies of 94 dead South Vietnamese soldiers. At the same time, the VC 45th Battalion attacked the ARVN 39th Ranger Battalion on Mount Chop Non. The VC bombarded the South Vietnamese with heavy mortars, which were followed by infantry assaults. By 4 am the VC 45th Battalion had successfully recaptured their final objective of Mount Chop Non, leaving the 39th Ranger Battalion decimated with 108 soldiers killed.
The battle at Ba Gia, which marked the beginning of the VC’s Summer Offensive of 1965, had dealt a severe blow to South Vietnam’s armed forces. For the first time in the VC’s history, their forces at Ba Gia successfully decimated a regimental-sized ARVN Task Force in battle.[21] According to Vietnam’s official account of the battle, the VC killed or wounded 915 South Vietnamese soldiers, and 270 others were captured. In addition to the human casualties, the VC also captured 370 weapons of various kinds and destroyed 14 GMC trucks. South Vietnam, on the other hand, claimed to have killed 556 enemy soldiers, but only captured 20 weapons. Following their military victory, the VC Quang Ngai Provincial Committee initiated a political campaign to exercise political influence over the province. By June 3, 1965, the VC virtually controlled five districts in northern Quang Ngai Province (Binh Son, Son Tinh, Nghia Hanh, Tu Nghia and Mo Duc), home to 10,000 civilians.
Even though the fighting at Ba Gia was minor in scale, it convinced President Lyndon B. Johnson that South Vietnam’s armed forces could not deal with the growing Communist forces by themselves. On July 20, 1965, U.S. Secretary of Defence Robert McNamara laid out three options before Johnson concerning the American involvement in Vietnam: 1) withdraw all American personnel from Vietnam to minimise their losses; 2) continue American commitments at their then approximate level of about 75,000 men; 3) substantially expand the American military presence in Vietnam. Ultimately, President Johnson chose the third option and decided to ‘Americanise’ the Vietnam War, and by July 22 the U.S. military was authorised to raise its combat strength in Vietnam to 44 battalions. Thus, total U.S. military presence in Vietnam grew from 75,000 to 125,000 men, drawn mainly from the U.S. Army and the U.S. Marine Corps. Undeterred by this growing U.S. military strength, North Vietnamese leaders decided to match American commitments by increasing the number of their troops in South Vietnam, thereby escalating the war.

The Ba Gia victory monument in Quang Ngai Province.

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