books.google.ca - An expert examination of the evolution of military aviation and its profound impact on warfare-from the employment of balloons during the French Revolutionary wars to the use of aircraft in World War I....http://books.google.ca/books/about/Military_aircraft_origins_to_1918.html?id=7pS1QpH8FRgC&utm_source=gb-gplus-shareMilitary aircraft, origins to 1918
