Operation Rolling Thunder

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 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.

Source: Wikipedia — Operation Rolling Thunder (CC BY-SA 4.0)