Final answer:
The B-52 Stratofortress was the bomber commonly used during the Vietnam War, particularly in Operation Rolling Thunder, part of a strategy to inflict heavy enemy losses through aerial bombardment.
Step-by-step explanation:
During the Vietnam War, the type of bomber that was commonly used against the enemy was the B-52 Stratofortress. This bomber was notorious for its role in Operation Rolling Thunder, a sustained bombing campaign that lasted from 1965 to 1968. The campaign aimed to drop such a large amount of ordnance on Vietnam that it exceeded the total delivered in all of World War II. The B-52 was part of the United States' strategy to use aerial bombardment in combination with ground forces to wear down the Viet Cong and North Vietnamese Army (NVA), without attempting to seize territory but to cause unsustainable losses to the enemy forces.