What new tactic did the US employ to end WWII, using bombs that were dropped on Hiroshima and Nagasaki?

The correct answer is atomic bombs. The United States employed atomic bombs in an unprecedented tactic that aimed to bring a swift end to World War II. The bombings of Hiroshima on August 6, 1945, and Nagasaki on August 9, 1945, involved the use of atomic weapons, which were developed under the Manhattan Project. These bombs utilized nuclear fission, releasing immense energy and resulting in catastrophic destruction. The unprecedented scale of devastation caused by these atomic bombs was intended to compel Japan to surrender unconditionally, ultimately contributing to the end of the war.

In contrast to atomic bombs, napalm and incendiary bombs were used in different contexts during the war, primarily for firebombing campaigns aimed at destroying infrastructure and civilian targets, but they did not have the same level of destructive capacity as atomic bombs. Conventional bombs refer to the standard explosives used throughout the war, while they were effective, they did not have the same immediate and overwhelming impact associated with nuclear weapons. This makes atomic bombs specifically significant as a new tactic employed by the U.S. during the closing stages of WWII.