What operation was noted for its air offensive against Japan?

Operation Matterhorn was a significant campaign in World War II noted for its air offensive against Japan. It involved the strategic bombing of Japanese industrial and military targets, primarily utilizing the resources of the Army Air Forces. This operation aimed to weaken Japan's capacity to sustain warfare, leading to crucial advantages for Allied forces in the Pacific Theater.

The essence of Operation Matterhorn was its focus on long-range bombing missions that were intended to disrupt Japanese logistics and diminish their war-making capabilities. The operation also paved the way for subsequent strategies and missions, directly contributing to the eventual Allied victories in the region.

The other options, while also important operations during World War II, focus on different theaters or objectives. Operation Overlord, for example, refers to the Normandy landings in Europe, where Allied forces established a foothold against Nazi Germany. Operation Torch pertains to the Allied invasion of North Africa, which aimed to secure the region and limit Axis influence. Finally, Operation Neptune is part of Operation Overlord that specifically deals with the naval component of the Normandy invasion. Understanding these distinct missions helps put the significance of Operation Matterhorn and its specific focus on Japan into perspective.