 The PAVN launched one more attack on May 19 in honor of Ho Chi Minh's birthday.The defenders were not surprised, and the attack was broken up by U.S. air support and an ambush by the ARVN paratroopers.On 13 May with intensive air support the 31st Regiment finally overran the PAVN positions and extended ARVN control to 8km north of Chơn Thành.