There was a lot of talk about carpet bombing during the 2016 election.
That potential world leaders are talking about a military tactic like this means it might be a good idea take a look at just what carpet bombing means.
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Carpet bombing, once known as "saturation bombing," is a large-scale aerial bombing operation over a small area, intent on the complete destruction of a target or targets. Such an operation in a civilian area is considered a war crime under the Geneva Conventions, though the United States is not a signatory to that protocol.
German and British bombers used the tactic throughout World War II, to great effect. The United States' Army Air Forces took it to the next level in Germany and then Japan under the leadership of Gen. Curtis LeMay. The U.S. would return to the tactic during the Vietnam War, especially for Operations Rolling Thunder and Linebacker II.
It is a devastating tactic that causes a lot of destruction. Since it is heavily dependent on unguided, "dumb" bombs, the potential for collateral and unnecessary death and destruction is very high and the U.S. Air Force hasn't used it since Vietnam. They still train for the capability, however.
The video below is an amalgamation of U.S. Air Force footage over the previous decades. It shows real-world and training operations where carpet bombing is used as a tactic. B-52 Stratofortresses, B-1 Lancers, and B-2 Spirits are seen dropping tons and tons of ordnance on targets.
It shows the pure power potential of the Air Force's conventional bombing force. Real air power doesn't require nukes – overwhelming force can be just as devastating.