During World War 1 some countries used planes at the latter end of the war for military purposes. Several farsighted European entrepreneurs, emboldened by wartime progress in aviation, envisioned the possibilities of postwar airline travel. Although not many airfields existed, aircrafts of the postwar era could and did use relatively short sod runways for years, meaning that locating suitable airports near most cites was not a formidable engineering challenge. The entrepreneurs modified stocks of military planes especially bombers to accommodate passengers and mail. Airliners ran newspaper advertisements after World War 1 trying to bring wealthy businesses and wealthy families to the airline to travel instead of by steam boat or train. The
