Communist forces launch rocket and mortar attacks on numerous cities, provincial capitals, and military installations. The heaviest shelling was on the U.S. airfield at Da Nang, the cities of Hue and Quang Tri. North Vietnamese forces numbering between 1200 and 1500 troops attacked the U.S. Special Forces camp at Duc Lap, 130 miles northeast of Saigon near the Cambodian border. The camp fell but was retaken by an allied relief column led by U.S. Special Forces on August 25. A reported 643 North Vietnamese troops were killed in the battle.