A Boeing 737 airliner is an example of a fixed-wing aircraft
An F-16 Fighting Falcon (left), P-51D Mustang (bottom), F-86 Sabre (top), and F-22 Raptor (right) fly in a formation representing four generations of American fighters.
Clockwise from the top: The road to Bapaume in the aftermath of the Battle of the Somme, 1916

British Mark V tanks crossing the Hindenburg Line, 1918

 sinking after hitting a mine in the Dardanelles, 1915

A British Vickers machine gun crew wearing gas masks during the Battle of the Somme, 1916

German Albatros D.III biplane fighters near Douai, France, 1917
Delta (triangular) kite
Airco DH.2 "pusher" scout
Rival military coalitions in 1914: Triple Entente in green; Triple Alliance in brown. Only the Triple Alliance was a formal "alliance"; the others listed were informal patterns of support.
Boys flying a kite in 1828 Bavaria, by Johann Michael Voltz
The USAF Lockheed Martin F-35A
, a, Germany's first response to the British Dreadnought
Le Bris and his glider, Albatros II, photographed by Nadar, 1868
SPAD S.A.2, with gunner in "basket" up front
Sarajevo citizens reading a poster with the proclamation of the Austrian annexation in 1908
Wright Flyer III piloted by Orville Wright over Huffman Prairie, 4 October 1905
Jules Védrines in his Nieuport 16, armed with a Lewis, after clearing the front line of German observation balloons with the first rocket attack in history
Traditionally thought to show the arrest of Gavrilo Princip (right), historians now believe this photo depicts an innocent bystander, Ferdinand Behr
Santos-Dumont's self-propelled 14-bis on an old postcard
A replica German Fokker Dr.I
Crowds on the streets in the aftermath of the anti-Serb riots in Sarajevo, 29 June 1914
Curtiss NC-4 flying boat after it completed the first crossing of the Atlantic in 1919, standing next to a fixed-wing heavier-than-air aircraft
Nieuport-Delage NiD.52, which in various forms would be used through the 20s and into the 1930s by various European air arms, including that of the French and Spanish.
Ethno-linguistic map of Austria-Hungary, 1910. Bosnia-Herzegovina was annexed in 1908.
Aircraft parked on the ground in Afghanistan
A Messerschmitt Bf 109E warbird demonstrator
Cheering crowds in London and Paris on the day war was declared.
A glider (sailplane) being winch-launched
A Supermarine Spitfire, typical World War II fighter optimized for high level speeds and good climb rates.
Serbian Army Blériot XI "Oluj", 1915
Ultralight "airchair" Goat 1 glider
Grumman F4F-3 Wildcat, early 1942
German soldiers on the way to the front in 1914; at this stage, all sides expected the conflict to be a short one.
A 1943 USAAF Waco CG-4A
North American P-51D Mustang during WWII
French bayonet charge during the Battle of the Frontiers; by the end of August, French casualties exceeded 260,000, including 75,000 dead.
Hang gliding
The Messerschmitt Me 262 was one of the fastest aircraft of WWII.
World empires and colonies around 1914
A kite in flight
The Gloster Meteor was Britain’s first jet fighter and the Allies' only jet aircraft used during World War II
The British Indian infantry divisions were withdrawn from France in December 1915, and sent to Mesopotamia.
Chinese dragon kite more than one hundred feet long which flew in the Berkeley, California, kite festival in 2000
English Electric Lightning
Trenches of the 11th Cheshire Regiment at Ovillers-la-Boisselle, on the Somme, July 1916
A quad-line traction kite, commonly used as a power source for kite surfing
U.S. Air Force McDonnell Douglas F-4 Phantom II
Royal Irish Rifles in a communications trench, first day on the Somme, 1916
Train of connected kites
The U.S. Air Force McDonnell F-15 Eagle
Dead German soldiers at Somme 1916
The IAI Heron is an unmanned aerial vehicle (UAV) with a twin-boom configuration
A MiG-31 of the Russian Air Force
King George V (front left) and a group of officials inspect a British munitions factory in 1917.
The An-225 Mriya, the largest airplane in the world, which can carry a 250-tonne payload, has two vertical stabilizers
An F/A-18C Hornet
Battleships of the Hochseeflotte, 1917
Captured Morane-Saulnier L wire-braced parasol monoplane
The Dassault Rafale over RIAT in 2009
U-155 exhibited near Tower Bridge in London, after the 1918 Armistice
Two Dassault Mirage G prototypes, one with wings swept (top)
Lockheed Martin/Boeing F-22 Raptor at the 2008 Joint Services Open House airshow
Refugee transport from Serbia in Leibnitz, Styria, 1914
The US-produced B-2 Spirit, a strategic bomber capable of intercontinental missions, has a flying wing configuration
Chengdu J-20 at the 2018 airshow in China
Bulgarian soldiers in a trench, preparing to fire against an incoming aeroplane
Computer-generated model of the Boeing X-48
The Sukhoi Su-57 of the Russian Air Force
Austro-Hungarian troops executing captured Serbians, 1917. Serbia lost about 850,000 people during the war, a quarter of its pre-war population.
The Martin Aircraft Company X-24 was built as part of a 1963–1975 experimental US military program
M61 20 mm gun installation on West German Lockheed F-104G Starfighter
Australian troops charging near a Turkish trench during the Gallipoli Campaign
Canards on the Saab Viggen
AIM-9 Sidewinder (underwing pylon) and AIM-120 AMRAAM (wingtip) carried by lightweight F-16 fighter
Mehmed V greeting Wilhelm II on his arrival at Constantinople
Typical light aircraft (Cessna 150M) cockpit with control yokes
An MBDA Meteor, an ARH BVR AAM used on the Eurofighter Typhoon, Saab JAS 39 Gripen, Lockheed Martin F-35, and Dassault Rafale
Kaiser Wilhelm II inspecting Turkish troops of the 15th Corps in East Galicia, Austria-Hungary (now Poland). Prince Leopold of Bavaria, the Supreme Commander of the German Army on the Eastern Front, is second from the left.
The six basic flight instruments. Top row (left to right): airspeed indicator, attitude indicator, altimeter. Bottom row (left to right): turn coordinator, heading indicator, vertical speed indicator.
The Chengdu J-20 of the People's Liberation Army Air Force
Russian forest trench at the Battle of Sarikamish, 1914–1915
Isonzo Offensives 1915-1917
Austro-Hungarian trench at 3,850 metres in the Ortler Alps, one of the most challenging fronts of the war
Romanian troops during the Battle of Mărășești, 1917
Emperor Nicholas II and Commander-in-Chief Nikolai Nikolaevich in the captured Przemysl. The Russian Siege of Przemyśl was the longest siege of the war.
"They shall not pass", a phrase typically associated with the defence of Verdun
President Wilson asking Congress to declare war on Germany, 2 April 1917
The Allied Avenue, 1917 painting by Childe Hassam, that depicts Manhattan's Fifth Avenue decorated with flags from Allied nations
French infantry advance on the Chemin des Dames, April 1917
Canadian Corps troops at the Battle of Vimy Ridge, 1917
10.5 cm Feldhaubitze 98/09 and Ottoman artillerymen at Hareira in 1917 before the Southern Palestine offensive
British artillery battery on Mount Scopus in the Battle of Jerusalem, 1917. Foreground, a battery of 16 heavy guns. Background, conical tents and support vehicles.
Ottoman troops during the Mesopotamian campaign
French soldiers under General Gouraud, with machine guns amongst the ruins of a cathedral near the Marne, 1918
British 55th (West Lancashire) Division soldiers blinded by tear gas during the Battle of Estaires, 10 April 1918
Between April and November 1918, the Allies increased their front-line rifle strength while German strength fell by half.
Aerial view of ruins of Vaux-devant-Damloup, France, 1918
16th Bn (Canadian Scottish), advancing during the Battle of the Canal du Nord, 1918
An American major, piloting an observation balloon near the front, 1918
German Revolution, Kiel, 1918
Italian troops reach Trento during the Battle of Vittorio Veneto, 1918. Italy's victory marked the end of the war on the Italian Front and secured the dissolution of the Austro-Hungarian Empire.
Ferdinand Foch, second from right, pictured outside the carriage in Compiègne after agreeing to the armistice that ended the war there. The carriage was later chosen by Nazi Germany as the symbolic setting of Pétain's June 1940 armistice.
The signing of the Treaty of Versailles in the Hall of Mirrors, Versailles, 28 June 1919, by Sir William Orpen
Greek prime minister Eleftherios Venizelos signing the Treaty of Sèvres
Dissolution of Austria-Hungary after war
Map of territorial changes in Europe after World WarI (as of 1923)
Czechoslovak Legion, Vladivostok, 1918
Transporting Ottoman wounded at Sirkeci
Emergency military hospital during the Spanish flu pandemic, which killed about 675,000 people in the United States alone, Camp Funston, Kansas, 1918
Tanks on parade in London at the end of World War I
A Russian armoured car, 1919
38-cm "Lange Max" of Koekelare (Leugenboom),the biggest gun in the world in 1917
A Canadian soldier with mustard gas burns, c. 1917–1918
British Vickers machine gun, 1917
Royal Air Force Sopwith Camel. In April 1917, the average life expectancy of a British pilot on the Western Front was 93 flying hours.
Luftstreitkräfte Fokker Dr.I being inspected by Manfred von Richthofen, also known as the Red Baron.
Mobile radio station in German South West Africa, using a hydrogen balloon to lift the antenna
Austro-Hungarian soldiers executing men and women in Serbia, 1916
HMS Baralong
French soldiers making a gas and flame attack on German trenches in Flanders
Armenians killed during the Armenian Genocide. Image taken from Ambassador Morgenthau's Story, written by Henry Morgenthau Sr. and published in 1918.
German prisoners in a French prison camp during the later part of the war
British prisoners guarded by Ottoman forces after the First Battle of Gaza in 1917
Poster urging women to join the British war effort, published by the Young Women's Christian Association
Bermuda Volunteer Rifle Corps First Contingent in Bermuda, winter 1914–1915, before joining 1 Lincolnshire Regiment in France in June 1915. The dozen remaining after Guedecourt on 25 September 1916, merged with a Second Contingent. The two contingents suffered 75% casualties.
Sackville Street (now O'Connell Street) after the 1916 Easter Rising in Dublin
The Deserter, 1916: Anti-war cartoon depicting Jesus facing a firing squad with soldiers from five European countries
Possible execution at Verdun at the time of the mutinies in 1917. The original French text accompanying this photograph notes, however, that the uniforms are those of 1914–15 and that the execution may be that of a spy at the beginning of the war.
Bolshevik leaders Lenin and Trotsky promised "Peace, Land and Bread" to the impoverished masses
Young men registering for conscription, New York City, 5 June 1917
Military recruitment in Melbourne, Australia, 1914
British volunteer recruits in London, August 1914
1917 political cartoon about the Zimmermann Telegram. The message was intercepted by the British; its publication caused outrage and contributed to the U.S. entry into World War I.
The Italian Redipuglia War Memorial, which contains the remains of 100,187 soldiers
A typical village war memorial to soldiers killed in World War I
A 1919 book for veterans, from the US War Department
Poster showing women workers, 1915
War memorial to soldiers of the 49th Bengalee Regiment (Bangali Platoon) in Kolkata, India, who died in the war.

Fighter aircraft are fixed-wing military aircraft designed primarily for air-to-air combat.

- Fighter aircraft

World War I served as a testbed for the use of the aircraft as a weapon.

- Fixed-wing aircraft

The earliest known aerial victory with a synchronized machine gun-armed fighter aircraft occurred in 1915, by German Luftstreitkräfte Leutnant Kurt Wintgens.

- Fixed-wing aircraft

However at the outbreak of World War I, front-line aircraft were mostly unarmed and used almost exclusively for reconnaissance.

- Fighter aircraft

Fixed-wing aircraft were first used militarily by the Italians in Libya on 23 October 1911 during the Italo-Turkish War for reconnaissance, soon followed by the dropping of grenades and aerial photography the next year.

- World War I

To shoot down enemy planes, anti-aircraft guns and fighter aircraft were developed.

- World War I
A Boeing 737 airliner is an example of a fixed-wing aircraft

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