The British government establishes an air ministry. Lord Rothermere is Secretary of State for Air. Major-General Sir Hugh Trenchard is Chief of the Air Staff.
U.S. School of Aviation Medicine began operations under Maj. Williams H. Wilmer, Signal Corps, Hazelhurst Field, Mineola, N.Y. A low-pressure tank was constructed to simulate altitudes up to 30,000 feet, and some studies were conducted at Pikes Peak.
The first operational squadrons of the American Expeditionary Force are formed in France.
Regulation of the airways begins as US President Woodrow Wilson issues an order requiring licenses for civilian pilots and owners. Over 800 licenses are issued.
Lloyd Andrews Hamilton becomes the first American to receive a commission in the British Royal Flying Corps when he is assigned as lieutenant with No. 3 squadron in France.
The first American air casualty in World War I is Capt. James E. Miller who loses his life in a French Spad while flying a practice patrol across the German lines.
U. S. airplanes in France make the first operational flights.
The United Kingdom’s Royal Air Force is born. It is formed out the army’s Royal Flying Corps and the Royal Naval Air Service.
The Loughead brothers fly their seaplane, the F-1, from Santa Barbara to San Diego.
Belgian World War I fighter ace Willy Coppens records his first kill.
The first regular air mail service begins with regular flights between Washington, D.C. and New York City. It is operated by the U.S. Army Signal Corps.
The first air mail in Canada is flown from Montreal to Toronto.
The first American night patrol of the war takes place when a Felixstowe F.2A flying boat crewed by Ens. Ashton W. Hawkins and Lt. George F. Lawrence take off on patrol from RAF Killinghome, England.
The US Army Air Service and French Army assemble over 1200 war planes for the Battle of Saint-Mihiel, in what is at the time the largest aircraft force ever assembled for a single operation. The Allies would win the battle.
The Kettering Bug pilotless airplane being developed by Charles F. Kettering makes its first successful unmanned flight test, albeit for only nine seconds.
The first flight from England to India is made by A.S. MacLaren, Halley, and McEwen in Handley Page V-1500 four-engined bomber.