While the United States and the allies of World War II were fighting in Europe, a parallel war in the Pacific was raging. Almost solely on its own, the United States began a massive multi-front campaign against Japan, driving the enemy back to its homeland. Then, on the wings of the mighty B-29 Superfortress, launched the largest air assault in history, devastating dozens of cities, and culminating in the use of the newly developed nuclear bomb. The strategic air campaign and the nuclear bombs changed the world forever.