Battle of Đồng Xoài

The Battle of Đồng Xoài (Vietnamese: Trận Đồng Xoài) was a major battle fought during the Vietnam War as part of the Viet Cong (VC) Summer Offensive of 1965. It took place in Phước Long Province, South Vietnam, between 9 and 13 June 1965.

Political instability in Saigon gave North Vietnamese leaders an opportunity to step up their military campaign in the south. They believed that the South Vietnamese government's power relied on the country's strong military, so the North Vietnamese People's Army of Vietnam (PAVN) and VC launched the Summer Offensive of 1965 to inflict significant losses on South Vietnamese forces. In Phước Long Province, the PAVN/VC summer offensive culminated in the Đồng Xoài campaign.

The fight for Đồng Xoài began on the evening of 9 June 1965, when the VC 272nd Regiment attacked and captured the Civilian Irregular Defense Group and US Special Forces camp there. The Army of the Republic of Vietnam (ARVN) Joint General Staff responded to the sudden assault by ordering the ARVN 1st Battalion of the 7/5 Infantry to retake the district of Đồng Xoài. The ARVN forces arrived on the battlefield on 10 June but in the vicinity of Thuận Lợi, the VC 271st Regiment overwhelmed the South Vietnamese battalion. Later that day, the ARVN 52nd Ranger Battalion, which had survived an ambush while marching towards Đồng Xoài, recaptured the district. On 11 June the ARVN 7th Airborne Battalion arrived to reinforce the South Vietnamese position; as the Airborne were searching the Thuận Lợi rubber plantation for survivors from the 1st Battalion, the VC caught them in a deadly ambush.

On 13 June COMUSMACV General William Westmoreland, fearing that the VC might secure enough area to establish a large base in Phước Long Province, decided to insert elements of the US 173rd Airborne Brigade into a major battle for the first time. By then, however, the VC had already withdrawn from the battlefield, and the US paratroopers were ordered to return to base without having engaged with the VC.