American and South Vietnamese troops In the drive had by today met little resistance from Communist forces although intelligence had previously indi- ' cated the presence of at least nine Communist regiments or.27,000 troops in the area.American forces Involved Included elements of the Amer-Ical Division, the 101st. Airborne Division, the 5th Infantry Division Mechanized, support units along with artillery and air support, military spokesmen said.The Americans reopened and secured Highway 9 running from Dong Ha to Khe Sanh, which was reoccupied. The GIs also built a new airfield at the outpost, abandoned after a 77-day siege by Communist troops In April, 1968.They also reopened the former combat bases of Vendegr- ( 1ft, Bastogne, Veghel and Zon and built other artillery camps elsewhere along a 44 - mile stretch south to the rugged A Shau Valley.American forces also installed heavy guns at, Khe Sanh and Vandergrlft, including 15mm and 175mm howitzers, military spokesmen said.Field reports said the drive was conducted In 50-60-degree temperatures In fog, drizzle, mist pnd heavy clouds.Glant C130 Hercules transport planes were conducting a massive airlift of supplies Into Dong Ha and Qhang Trl, 375 to 400 miles north of Saigon, for movement to Allied forces to the west and south.