The Battle of Fire Support Base Ripcord was a 23 day battle between the U.S. Army 101st Airborne Division and the North Vietnamese Army from July 1, 1970 until July 23, 1970. It was the last major confrontation between United States ground forces and North Vietnam of the Vietnam War. Little was known about the battle until 1985, when the FSB Ripcord Association was founded. Three Medals of Honor and five Distinguished Service Crosses were earned during the operations.
President Nixon secretly began the withdrawal of troops from Vietnam early in 1969. As the only full-strength division remaining in Vietnam in early 1970, the 101st Airborne Division was ordered to conduct the planned offensive Operation Texas Star near the A Shau Valley, Warehouse Area.
On March 12, 1970, the 3rd Brigade, 101st began rebuilding abandoned Fire Support Base Ripcord which relied, as with most remote bases at the time, on a helicopter lifeline to get supplies in and the personnel out. The firebase was to be used for a planned offensive by the 101st to destroy NVA supply bases in the mountains overlooking the valley. Located on the eastern edge of the valley, and taking place at the same time as the Cambodian Incursion, the operation was considered covert.
As the 101st Airborne Division planned the attack on the NVA supply bases, the North Vietnamese Army was secretly observing their activities. After weeks of reconnaissance by the NVA, on the morning of July 1, 1970 the North Vietnamese Army launched a surprise mortar attack on the firebase. During the 23-day battle, 75 U.S. servicemen were killed in action, including Colonel Andre Lucas, who was posthumously awarded the Medal of Honor, and First Lt. Bob Kalsu, the only recently active pro athlete to be killed during the war.
Fighting from four hilltops, surrounded, and outnumbered nearly ten to one, U.S. forces causes heavy losses on eight enemy battalions before an aerial withdrawal under heavy mortar, anti-aircraft, and small arms fire. After the U.S. Army withdrew from the firebase, USAF B-52 heavy bombers were sent in to carpet bomb the area. NVA losses at Ripcord delayed the Easter Offensive by a full year.