Operation Rolling Thunder was a gradual and sustained aerial bombardment campaign conducted by the United States (U.S.) 2nd Air Division (later Seventh Air Force), U.S. Navy, and Republic of Vietnam Air Force (RVNAF) against North Vietnam from 2 March 1965 until 2 November 1968, during the Vietnam War.
The four objectives of the operation (which evolved over time) were to boost the morale of South Vietnam; to force North Vietnam to stop sending soldiers and materiel into South Vietnam to fight in the communist insurgency; and to destroy North Vietnam's transportation system, industrial base, and air defenses. Attainment of these objectives was made difficult by both the restraints imposed upon the U.S. and its allies by Cold War exigencies, and the military aid and assistance received by North Vietnam from its communist allies, the Soviet Union, the People's Republic of China and North Korea.
The operation became the most intense air/ground battle waged during the Cold War period; it was the most difficult such campaign fought by the United States since the aerial bombardment of Germany during World War II. Supported by its communist allies, North Vietnam fielded a potent mixture of MiG fighter-interceptor jets and sophisticated air-to-air and surface-to-air weapons that created one of the most effective air defenses ever faced by American military aviators. The limited effectiveness of the operation and the pursuit of peace talks led to the scaling back of the operation in March 1968 and its cancellation in November 1968.