This is a list of aviation-related events from 1914.
The outbreak of World War I accelerates all aspects of aviation which in turn changes war in a twofold way. The aeroplane turns the sky into a new battlefield and eliminates the distinction between frontline and hinterland, with the civilian population far behind the frontline also becoming a target. The war results in the deaths of approximately 20,000 flyers, most of them trained pilots.
The Naval Wing of the Royal Flying Corps is given the responsibility for the operation of all British military airships. The Royal Navy will retain control of all British airships until December 1919.
20 June – While the Austro-HungarianairshipMilitärluftschiff III (or M.III) hovers over Fischamend testing new camera equipment, an Austro-Hungarian Army pilot tries to loop M.III in a Farmanbiplane. The airplane strikes the top of the airship, tearing a hole and igniting the escaping hydrogen gas. Both aircraft are destroyed, and both men in the airplane and all seven men aboard M.III are killed. It is the end of the Austro-Hungarian airship program.
Imperial German NavyRear AdmiralPaul Behncke, Chief of the Naval Staff, urges that the navy 's Zeppelins begin attacks on London, arguing that Zeppelin attacks "may be expected, whether they involve London or the neighborhood of London, to cause panic in the population which may possibly render it doubtful that the war may be continued."
1 August – Germany and Russia enter World War I with Germany 's declaration of war on Russia.
France and Belgium enter World War I when Germany invades Belgium and declares war on France.
21 August – Two Imperial Germany Army Zeppelins on their first combat missions become the second and third airships lost in combat after being damaged by French infantry and artillery fire during low-altitude missions in the Vosges mountains. Z VII limps back into Germany to crash near St. Quirin in Lothringen, while Z VIII crash-lands in Badonvillers Forest near Badonvillers, France, where French cavalry drives off her crew and loots her. The loss of three airships on their first combat missions in August sours the German Army on the further combat use of airships.
An early attempt to get a Lewis gun into action in air-to-air combat fails when a Royal Flying Corps Farman armed with one scrambles to intercept a German Albatros and takes 30 minutes to climb to 1,000 feet (305 meters) because of the gun's weight. On landing, the pilot is ordered to remove the Lewis gun and carry a rifle on future missions.
23 August – Japan enters World War I, declaring war on Germany.
Early September – In a memorandum, First Sea LordWinston Churchill establishes the policy for the air defense of the United Kingdom. He calls for the use of antiaircraft artillery and searchlights around likely targets; the deployment of aircraft forward in Europe to attack all Zeppelin and other enemy air bases within reach; the interception of enemy aircraft between Dover and London by British aircraft, coordinated by telephone and telegraph; the basing of aircraft at Hendon specifically for the defense of London, with their crews specifically trained and equipped for night-fighting and their operations also coordinated by telephone; a blackout in major cities; and warning the public of the dangers of air attack, precautions against it, and how to take shelter when under air attack.
27 September – The first French bomber group is formed.
28 September – The first report by British observers of German military aircraft using the Iron Cross national markings.
30 September –
The Wakamiya is damaged by a naval mine and forced to retire from the Siege of Tsingtao, ending the first combat deployment of an aviation ship in history.
The two America prototypes prepared for the Daily Mail sponsored transatlantic constest in August are shipped to the United Kingdom aboard RMS Mauretania for the Royal Naval Air Service, spawning a fleet of aircraft which saw extensive military service during World War I,  developed extensively in the process for anti-submarine patrol craft and air-sea rescue.
13 October – The Imperial Japanese Navy attempts air-to-air combat for the first time, as a naval airplane joins three Imperial Japanese Army airplanes in an attempt to attack a German reconnaissance plane during the Siege of Tsingtao. The German aircraft escapes.
26 October – The British Admiralty issued instructions to paint the Union Jack on the underside of the wings on Royal Naval Air Service aircraft.
1 November – The Ottoman Empire enters World War I when Russia declares war on it.
18 November – The Secretary of State for the German Navy, AdmiralAlfred von Tirpitz, advocating massed Zeppelin attacks on London, writes, "The English are now in terror of the Zeppelin, perhaps not without reason...[S]ingle bombs from flying machines are wrong; they are odious when they hit and kill old women, and one gets used to them. If [however] one could set fire to London in thirty places, then what in a small way is odious would retire before something fine and powerful."
27 November – The first air-sea battle in history occurs when Imperial Japanese Navy Farman seaplanes make an unsuccessful attempt to bomb German and Austro-Hungarian ships in Kiaochow Bay during the Siege of Tsingtao.
Upon the conclusion of the Siege of Tsingtao, the Wakamiya returns Japanese naval seaplanes deployed at Tsingtao to Japan. The Japanese naval air arm sees no further combat during World War I.
10 December – HMS Ark Royal is completed. She is the first ship with an internal hangar enclosed by her hull, and the first with specially designed internal spaces to accommodate aviation fuel, lubricants, ordnance, and spares and machinery required for aircraft maintenance.
25 December – HMS Empress, HMS Engadine, and HMS Riviera launch a seaplane attack on the Zeppelin sheds at Nordholz Airbase. It is the first attempt in history to exert sea power on land by means of the air. Fog prevents the aircraft from reaching their target, and only three of the nine aircraft find their way back to their mother ships.
^Whitehouse Arch, The Zeppelin Fighters, New York: Ace Books, 1966, no ISBN number, p. 50.
^[http://www.hydrogencommerce.com/zepplins/zepplins.htm#The%20Zeppelins Lehman, Ernst A., Captain, and Howard Mingos, The Zeppelins: The Development of the Airship, with the Story of the Zeppelins Air Raids in the World War, Kingsport, Tennessee: Kingsport Press, 1927, Chapter I (online). Whitehouse, Arch, The Zeppelin Fighters, New York: Ace Books, 1966, no ISBN number, p. 48, states that Z VI, which he identifies as L 6, had attacked the French "garrison town" of "Lutetia outside Paris" when she suffered her fatal damage.
^ Lehman, Ernst A., Captain, and Howard Mingos, The Zeppelins: The Development of the Airship, with the Story of the Zeppelins Air Raids in the World War, Kingsport, Tennessee: Kingsport Press, 1927, Chapter I (online).
^Whitehouse, Arch, The Zeppelin Fighters, New York: Ace Books, 1966, no ISBN number, p. 48.
^Donald, David, ed., The Complete Encyclopedia of World Aircraft, New York: Barnes & Noble Books, 1997, ISBN 978-0-7607-0592-6, p. 76.
Chant, Chris, The World's Great Bombers, New York: Barnes & Noble Books, 2000, ISBN 0-7607-2012-6
Crosby, Francis, The Complete Guide to Fighters & Bombers of the World: An Illustrated History of the World's Greatest Military Aircraft, From the Pioneering Days of Air Fighting in World War I Through the Jet Fighters and Stealth Bombers of the Present Day, London: Hermes House, 2006, ISBN 9781846810008
Peattie, Mark R., Sunburst: The Rise of Japanese Naval Air Power 1909-1941, Annapolis, Maryland: Naval Institute Press, 2001, ISBN 1-55750-432-6
Layman, R.D., Before the Aircraft Carrier: The Development of Aviation Vessels 1849-1922, Annapolis, Maryland: Naval Institute Press, 1989, ISBN 0-87021-210-9