What event has a feature that has been described as "the first major military campaign fought entirely by air forces"?
Battle of Britain The Battle of Britain (German: "Luftschlacht um England" , literally "the air battle for England") was a military campaign of the Second World War, in which the Royal Air Force (RAF) defended the United Kingdom (UK) against large-scale attacks by the German Air Force (Luftwaffe). It has been described as the first major military campaign fought entirely by air forces.
Bombing of Kōfu in World War II The Bombing of Kōfu in World War II (甲府空襲 , Kōfu kūshū ) was part of the strategic bombing campaign waged by the United States against military and civilian targets and population centers of the Empire of Japan during the Japan home islands campaign in the closing states of World War II.