The wings of the Navy, that had barely begun to sprout when the United States became a belligerent, grew in a year and a half as if under a conjurer’s wand. Previous to that time the appropriations that had been granted for the development of naval aeronautics had been so small that little could be done. Upon our declaration of war the Navy had 22 low powered seaplanes of no value except for training purposes, five kite and two free balloons and one dirigible balloon, and the Naval Aviation Service had three stations, but no adequate training field, while its personnel consisted of 45 naval aviators and less than 200 enlisted men. When the armistice was signed the Aviation Service of the American Navy had 1,656 trained airplane pilots, of whom half were in service over European waters; 1,349 ground, or executive, officers; 3,912 student officers at training fields at home or abroad who would soon have been ready for service; an enlisted personnel numbering almost 37,000; approximately 8,000 trained mechanics and 6,000 more in training; in France, sixteen naval aviation stations besides others for training and supply work; two stations in England and four in Ireland; three stations in Italy and the Azores; two stations in Canada; one station in the Canal Zone; eleven stations in the United States; 759 seaplanes and flying boats in service for patrol and bombing work and 140 airplanes or land machines for land service, with 491 seaplanes and 100 land airplanes for training purposes, while a dozen planes of new and experimental types were being tried out; 282 kite and seven free balloons and 11 dirigible balloons. Many hundreds of seaplanes, flying boats and balloons of various kinds were on order for early delivery. All this development of material and personnel, of systems of training for pilots, ground officers and mechanics, of stations and service, and of the big and smoothly working organization that produced important results in the work of the naval aviators was the growth of but eighteen months.