Page:A Concise History of the U.S. Air Force.djvu/70

 targets were merely geographical coordinates superimposed over the vast green jungle of Southeast Asia. Others were the smoke and dust kicked up by enemy forces as they moved down the trail by day. At night, they were campfires, hot engines, and other man-made infrared signatures picked up by airborne sensors. Fighters soon compelled the enemy to move only by night, when gunships took over. But using $10 million aircraft to destroy $10,000 trucks was no solution. Three Soviet ZIL-157 six-wheel drive trucks or 400 bicycles carrying 75 pounds each could provide the fifteen tons of supplies to Communist forces in South



Vietnam each day. More came from plundered American and South Vietnamese storehouses.

On January 30, 1968, enemy units launched the Tet Offensive, striking cities and other targets throughout South Vietnam. In February alone, Air Force units launched 16,000 strike sorties in support of ground operations, helping to blunt the offensive. The focus of the Air Force's operations, however, was the besieged firebase at Khe Sanh, where 6,000 Marines faced three North Vietnamese divisions. President Johnson told General Westmoreland that he did not want another "damn [Dien Bien Phu]." Air power would have to hold off Communist attacks. Three months of Operation NIAGARA totaled 24,000 fighter-bomber and 2,700 B-52 strikes, 110,000 tons of bombs, and nightly assaults by gunships. Additionally, the Air Force airlifted 12,000 tons of supplies to the surrounded Marines. Air power guaranteed that there would be no repeat of the French disaster at Dien Bien Phu.