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.
Action of 9 April 1914 The Action of 9 April 1914 was an important turning point in naval and aviation history. On the said date one of the first naval/air skirmishes took place. This engagement took place off the coast of western Mexico during the Mexican Revolution. The action was part of the naval campaign off Topolobampo at the edge of the Gulf of California. A Constitutionalist biplane dropped bombs on two Huertista gunboats; they all missed.