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World War I was the first major conflict involving the large-scale use of
aircraft An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. ...
. Tethered observation balloons had already been employed in several wars, and would be used extensively for
artillery spotting An artillery observer, artillery spotter or forward observer (FO) is responsible for directing artillery and mortar fire onto a target. It may be a '' forward air controller'' (FAC) for close air support (CAS) and spotter for naval gunfire su ...
. Germany employed
Zeppelin A Zeppelin is a type of rigid airship named after the German inventor Count Ferdinand von Zeppelin () who pioneered rigid airship development at the beginning of the 20th century. Zeppelin's notions were first formulated in 1874Eckener 1938, p ...
s for
reconnaissance In military operations, reconnaissance or scouting is the exploration of an area by military forces to obtain information about enemy forces, terrain, and other activities. Examples of reconnaissance include patrolling by troops (skirmishers ...
over the North Sea and
Baltic Baltic may refer to: Peoples and languages *Baltic languages, a subfamily of Indo-European languages, including Lithuanian, Latvian and extinct Old Prussian *Balts (or Baltic peoples), ethnic groups speaking the Baltic languages and/or originatin ...
and also for
strategic bombing Strategic bombing is a military strategy used in total war with the goal of defeating the enemy by destroying its morale, its economic ability to produce and transport materiel to the theatres of military operations, or both. It is a systematica ...
raids over Britain and the Eastern Front.
Aeroplane An airplane or aeroplane (informally plane) is a fixed-wing aircraft that is propelled forward by thrust from a jet engine, propeller, or rocket engine. Airplanes come in a variety of sizes, shapes, and wing configurations. The broad spectr ...
s were just coming into military use at the outset of the war. Initially, they were used mostly for
reconnaissance In military operations, reconnaissance or scouting is the exploration of an area by military forces to obtain information about enemy forces, terrain, and other activities. Examples of reconnaissance include patrolling by troops (skirmishers ...
. Pilots and engineers learned from experience, leading to the development of many specialized types, including fighters,
bomber A bomber is a military combat aircraft designed to attack ground and naval targets by dropping air-to-ground weaponry (such as bombs), launching torpedoes, or deploying air-launched cruise missiles. The first use of bombs dropped from an aircr ...
s, and trench strafers.
Ace An ace is a playing card, die or domino with a single pip. In the standard French deck, an ace has a single suit symbol (a heart, diamond, spade, or club) located in the middle of the card, sometimes large and decorated, especially in the ca ...
fighter pilots were portrayed as modern knights, and many became popular heroes. The war also saw the appointment of high-ranking officers to direct the belligerent nations' air war efforts. While the impact of aircraft on the course of the war was mainly tactical rather than strategic, most important being direct cooperation with ground forces (especially ranging and correcting artillery fire), the first steps in the strategic roles of aircraft in future wars were also foreshadowed.


The early years of war

At the 1911 meeting of the
Institute of International Law The Institute of International Law ( French: Institut de Droit International) is an organization devoted to the study and development of international law, whose membership comprises the world's leading public international lawyers. The organizat ...
in Madrid, legislation was proposed to limit the use of aeroplanes to reconnaissance missions and banning them from being used as platforms for weapons. This legislation was rooted in a fear that aeroplanes would be used to attack undefended cities, violating Article 69 of the Den Hague ''Reglement'' (the set of international laws governing warfare)''.'' At the start of the war, there was some debate over the usefulness of aircraft in warfare. Many senior officers, in particular, remained skeptical. However the initial campaigns of 1914 proved that
cavalry Historically, cavalry (from the French word ''cavalerie'', itself derived from "cheval" meaning "horse") are soldiers or warriors who fight mounted on horseback. Cavalry were the most mobile of the combat arms, operating as light cavalry in ...
could no longer provide the reconnaissance expected by their generals, in the face of the greatly increased firepower of twentieth century armies, and it was quickly realised that
aircraft An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. ...
could at least locate the enemy, even if early air reconnaissance was hampered by the newness of the techniques involved. Early skepticism and low expectations quickly turned to unrealistic demands beyond the capabilities of the primitive aircraft available. Even so, air reconnaissance played a critical role in the "war of movement" of 1914, especially in helping the Allies halt the German invasion of France. Aircraft were first used during
Alexander von Kluck Alexander Heinrich Rudolph von Kluck (20 May 1846 – 19 October 1934) was a German general during World War I. Early life Kluck was born in Münster, Westphalia on 20 May 1846. He was the son of architect Karl von Kluck and his wife Elisab ...
's German First Army during the
Battle of Mons A battle is an occurrence of combat in warfare between opposing military units of any number or size. A war usually consists of multiple battles. In general, a battle is a military engagement that is well defined in duration, area, and force ...
to target its guns on British II Corps positions. On 22 August 1914, British Captain L.E.O. Charlton and Lieutenant V.H.N. Wadham of the Royal Flying Corps (RFC) reported von Kluck's forces were preparing to surround the British Expeditionary Force, contradicting all other intelligence. The British High Command took note of the report and started to withdraw from Mons, saving the lives of 100,000 soldiers. Later, during the First Battle of the Marne, observation aircraft discovered weak points and exposed flanks in the German lines, allowing the allies to take advantage of them. In Germany the great successes of the early
Zeppelin A Zeppelin is a type of rigid airship named after the German inventor Count Ferdinand von Zeppelin () who pioneered rigid airship development at the beginning of the 20th century. Zeppelin's notions were first formulated in 1874Eckener 1938, p ...
airships had largely overshadowed the importance of heavier-than-air aircraft. Out of a paper strength of about 230 aircraft belonging to the army in August 1914 only 180 or so were of any use. The French military aviation exercises of 1911, 1912, and 1913 had pioneered cooperation with the cavalry (reconnaissance) and artillery (spotting), but the momentum was, if anything, slacking. The United Kingdom had "started late" and initially relied largely on the French aircraft industry, especially for aircraft engines. The initial British contribution to the total allied airwar effort in August 1914 (of about 184 aircraft) was three squadrons with about 30 serviceable machines. By the end of the war, the
British Armed Forces The British Armed Forces, also known as His Majesty's Armed Forces, are the military forces responsible for the defence of the United Kingdom, its Overseas Territories and the Crown Dependencies. They also promote the UK's wider interests, su ...
had formed the world's first air force to be independent of either army or naval control, the Royal Air Force. The United States Armed Forces air services were far behind; even in 1917, when the United States entered the war, they were to be almost totally dependent on the French and British aircraft industries for combat aircraft. The Germans' great air "coup" of 1914 was at the
Battle of Tannenberg The Battle of Tannenberg, also known as the Second Battle of Tannenberg, was fought between Russia and Germany between 26 and 30 August 1914, the first month of World War I. The battle resulted in the almost complete destruction of the Ru ...
in East Prussia, where an unexpected Imperial Russian Army attack was reported by '' Leutnants'' Canter and Mertens, resulting in the Russians being forced to withdraw.


Early Western Front reconnaissance duties

By the end of 1914 the line between the Imperial German Army and the Allied powers stretched from the North Sea to the
Alps The Alps () ; german: Alpen ; it, Alpi ; rm, Alps ; sl, Alpe . are the highest and most extensive mountain range system that lies entirely in Europe, stretching approximately across seven Alpine countries (from west to east): France, Sw ...
. The initial "war of movement" largely ceased, and the front became static. Three main functions of short range reconnaissance squadrons had emerged by March 1915. The first was
photographic reconnaissance Imagery intelligence (IMINT), pronounced as either as ''Im-Int'' or ''I-Mint'', is an intelligence gathering discipline wherein imagery is analyzed (or "exploited") to identify information of intelligence value. Imagery used for defense intell ...
: building up a complete mosaic map of the enemy trench system. The first air cameras used glass plates. (
Photographic film Photographic film is a strip or sheet of transparent film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide crystals. The sizes and other characteristics of the crystals determine t ...
had been invented by Kodak, but did not at this stage have sufficient resolution).An Illustrated History of World War I, at http://www.wwiaviation.com/earlywar.html Artillery "spotting" enabled the ranging of artillery on targets invisible to the gunners. Radio telephony was not yet practical from an aircraft, so communication was a problem. By March 1915, a two-seater on "artillery observation" duties was typically equipped with a primitive
radio transmitter In electronics and telecommunications, a radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna. The transmitter itself generates a radio frequency alternating current, which is applied to th ...
transmitting using
Morse code Morse code is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called ''dots'' and ''dashes'', or ''dits'' and ''dahs''. Morse code is named after Samuel Morse, one ...
, but had no receiver. The
artillery battery In military organizations, an artillery battery is a unit or multiple systems of artillery, mortar systems, rocket artillery, multiple rocket launchers, surface-to-surface missiles, ballistic missiles, cruise missiles, etc., so grouped to facil ...
signalled to the aircraft by laying strips of white cloth on the ground in prearranged patterns. Observation duties were shared with the tethered
balloon A balloon is a flexible bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, and air. For special tasks, balloons can be filled with smoke, liquid water, granular media (e.g. sand, flour or rice), or light s ...
s, which could communicate directly with their batteries by field telephone, but were far less flexible in locating targets and reporting the fall of shot. "Contact patrol" work attempted to follow the course of a battle by communicating with advancing infantry while flying over the battlefield. The technology of the period did not permit radio contact, while methods of signalling were necessarily crude, including dropping messages from the aircraft. Soldiers were initially reluctant to reveal their positions to aircraft, as they (the soldiers) found distinguishing between friend and foe problematic. Reconnaissance flying, like all kinds, was a hazardous business. In April 1917, the worst month for the entire war for the RFC, the average life expectancy of a British pilot on the Western Front was 69 flying hours.


Early bombing efforts

Typical 1914 aircraft could carry only very small bomb loads – the bombs themselves, and their storage, were still very elementary, and effective bomb sights were still to be developed. Nonetheless the beginnings of strategic and tactical bombing date from the earliest days of the war. Notable are the raids by the RNAS on the German airship sheds at Düsseldorf, Cologne and Friedrichshafen in September, October and November 1914, as well as the formation of the ''Brieftauben Abteilung Ostende''.


The dawn of air combat

As Dickson had predicted, initially air combat was extremely rare, and definitely subordinate to reconnaissance. There are even stories of the crew of rival reconnaissance aircraft exchanging nothing more belligerent than smiles and waves. This soon progressed to throwing
grenades A grenade is an explosive weapon typically thrown by hand (also called hand grenade), but can also refer to a shell (explosive projectile) shot from the muzzle of a rifle (as a rifle grenade) or a grenade launcher. A modern hand grenade gene ...
, and other objects—even
grappling hook A grappling hook or grapnel is a device that typically has multiple hooks (known as ''claws'' or ''flukes'') attached to a rope; it is thrown, dropped, sunk, projected, or fastened directly by hand to where at least one hook may catch and hol ...
s. The first aircraft brought down by another was an Austrian reconnaissance aircraft rammed on 8 September 1914 by a Russian pilot
Pyotr Nesterov Pyotr Nikolayevich Nesterov (russian: Пётр Николаевич Нестеров ( – ) was a Russian pilot, an aircraft designer and an aerobatics pioneer. Life and career Nesterov was born on 15 February 1887 in Nizhny Novgorod, int ...
in Galicia in the Eastern Front. Both planes crashed as the result of the attack, killing all occupants. Eventually, pilots began firing handheld firearms at enemy aircraft; however, pistols were too inaccurate and the single-shot rifles too unlikely to score a hit. On October 5, 1914, French pilot Louis Quenault opened fire on a German aircraft with a machine gun for the first time and the era of air combat was underway as more and more aircraft were fitted with machine guns.


Evolution of fighter aircraft


The pusher solution

As early as 1912, designers at the British firm Vickers were experimenting with machine gun carrying aircraft. The first concrete result was the Vickers Experimental Fighting Biplane 1, which featured at the 1913 Aero Show in London. and appeared in developed form as the FB.5 in February 1915. This pioneering fighter, like the Royal Aircraft Factory F.E.2b and the
Airco DH.1 The Airco DH.1 was an early military biplane of typical "Farman" pattern flown by Britain's Royal Flying Corps during World War I. By the time the powerplant for which it was designed was sufficiently plentiful it was obsolete as an operational ...
, was a pusher type. These had the engine and propeller behind the pilot, facing backward, rather than at the front of the aircraft, as in a tractor configuration design. This provided an optimal machine gun position, from which the gun could be fired directly forward without an obstructing propeller, and reloaded and cleared in flight. An important drawback was that pusher designs tended to have an inferior performance to tractor types with the same engine power because of the extra drag created by the struts and rigging necessary to carry the tail unit. The F.E.2d, a more powerful version of the F.E.2b, remained a formidable opponent well into 1917, when pusher fighters were already obsolete. They were simply too slow to catch their quarry.


Machine gun synchronisation

The forward firing gun of a pusher "gun carrier" provided some offensive capability—the mounting of a machine gun firing to the rear from a two-seater tractor aircraft gave defensive capability. There was an obvious need for some means to fire a machine gun forward from a tractor aircraft, especially from one of the small, light, " scout" aircraft, adapted from pre-war racers, that were to perform most air combat duties for the rest of the war. It would seem most natural to place the gun between the pilot and the propeller, firing in the direct line of flight so that the gun could be aimed by "aiming the aircraft". It was also important that the breech of the weapon be readily accessible to the pilot so that he could clear the jams and stoppages to which early machine guns were prone. However, this presented an obvious problem: a percentage of bullets fired "free" through a revolving propeller will strike the blades, with predictable results. Early experiments with synchronised machine guns had been carried out in several countries before the war. Franz Schneider, then working for Nieuport in France but later working for
L.V.G. Luftverkehrsgesellschaft m.b.H. (L.V.G. or LVG) was a German aircraft manufacturer based in Berlin- Johannisthal, which began constructing aircraft in 1912, building Farman-type aircraft. The company constructed many reconnaissance and light bomb ...
in Germany, patented a synchronisation gear on 15 July 1913. Early Russian gear was designed by a Lieutenant Poplavko: the Edwards brothers in England designed the first British example, and the
Morane-Saulnier Aéroplanes Morane-Saulnier was a French aircraft manufacturing company formed in October 1911 by Raymond Saulnier (1881–1964) and the Morane brothers, Léon (1885–1918) and Robert (1886–1968). The company was taken over and diversified ...
company were also working on the problem in 1914. All these early experiments failed to attract official attention, partly due to official inertia and partly due to the failures of early synchronising gears, which included dangerously ricocheting bullets and disintegrating propellers. The Lewis gun used on many Allied aircraft was almost impossible to synchronise due to the erratic rate of fire due to its
open bolt A firearm is said to fire from an open bolt if, when ready to fire, the bolt and working parts are held to the rear of the receiver, with no round in the chamber. When the trigger is actuated, the bolt travels forward, feeds a cartridge from t ...
firing cycle. Some RNAS aircraft, including
Bristol Scout The Bristol Scout was a single-seat Rotary engine, rotary-engined biplane originally designed as a racing aircraft. Like similar fast, light aircraft of the period it was used by the RNAS and the Royal Flying Corps, RFC as a "Scout (aircraft), ...
s, had an unsynchronised fuselage-mounted Lewis gun positioned to fire directly through the propeller disk. The propeller blades were reinforced with tape to hold the wood together if hit, and it relied on the fact that the odds of any single round hitting a blade below 5%, so if short bursts were used, it offered a temporary expedient even if it was not an ideal solution. The Maxim guns used by both the Allies (as the Vickers) and Germany (as the
Parabellum MG 14 The Parabellum MG 14 was a 7.92 mm caliber World War I machine gun built by Deutsche Waffen und Munitionsfabriken. It was a redesign of the Maschinengewehr 08 machine gun (itself an adaptation of the Maxim gun) system intended for use on ai ...
and Spandau lMG 08) had a
closed bolt A semi or full-automatic firearm which is said to fire from a closed bolt is one where, when ready to fire, a round is in the chamber and the bolt and working parts are forward. When the trigger is pulled, the firing pin or striker fires the ...
firing cycle that started with a bullet already in the breech and the breech closed, so the firing of the bullet was the next step in the cycle. This meant that the exact instant the round would be fired could be more readily predicted, making these weapons considerably easier to synchronise. The standard French light machine gun, the
Hotchkiss Hotchkiss may refer to: Places Canada * Hotchkiss, Alberta * Hotchkiss, Calgary United States * Hotchkiss, Colorado * Hotchkiss, Virginia * Hotchkiss, West Virginia Business and industry * Hotchkiss (car), a French automobile manufacturer ...
, was, like the Lewis, also unamenable to synchronisation. Poor quality control also hampered efforts, resulting in frequent "hang fire" rounds that didn't go off. The Morane-Saulnier company designed a "safety backup" in the form of "deflector blades" (metal wedges), fitted to the rear surfaces of a propeller at the radial point where they could be struck by a bullet. Roland Garros used this system in a Morane-Saulnier L in April 1915. He managed to score several kills, although the deflectors fell short of an ideal solution as the deflected rounds could still cause damage. Engine failure eventually forced Garros to land behind enemy lines, and he and his secret weapon were captured by the Germans. Famously, the German High Command passed Garros' captured Morane to the Fokker company—which already produced Morane type monoplanes for the German Air Service—with orders to copy the design. The deflector system was totally unsuitable for the steel-jacketed German ammunition so that the Fokker engineers were forced to revisit the synchronisation idea (perhaps infringing Schneider's patent), crafting the ''Stangensteuerung'' system by the spring of 1915, used on the examples of their pioneering ''Eindecker'' fighter. Crude as these little monoplanes were, they produced a period of German
air superiority Aerial supremacy (also air superiority) is the degree to which a side in a conflict holds control of air power over opposing forces. There are levels of control of the air in aerial warfare. Control of the air is the aerial equivalent of com ...
, known as the " Fokker Scourge" by the Allies. The psychological effect exceeded the material: The Allies had up to now been more or less unchallenged in the air, and the vulnerability of their older reconnaissance aircraft, especially the British B.E.2 and French Farman pushers, came as a very nasty shock.


Other methods

Another method used at this time to fire a machine gun forward from a tractor design was to mount the gun to fire above the propeller arc. This required the gun to be mounted on the top wing of biplanes and be mounted on complicated drag-inducing structures in monoplanes. Reaching the gun so that drums or belts could be changed, or jams cleared, presented problems even when the gun could be mounted relatively close to the pilot. Eventually, Foster mounting became more or less the standard way of mounting a Lewis gun in this position in the R.F.C.: this allowed the gun to slide backward for drum changing, and also to be fired at an upward angle, a very effective way of attacking an enemy from the "blind spot" under its tail. This type of mounting was still only possible for a biplane with a top wing positioned near the apex of the propeller's arc: It put considerable strain on the fragile wing structures of the period, and it was less rigid than a gun mounting on the fuselage, producing a greater "scatter" of bullets, especially at anything but very short range. The earliest versions of the
Bristol Scout The Bristol Scout was a single-seat Rotary engine, rotary-engined biplane originally designed as a racing aircraft. Like similar fast, light aircraft of the period it was used by the RNAS and the Royal Flying Corps, RFC as a "Scout (aircraft), ...
to see aerial combat duty in 1915, the Scout C, had Lewis gun mounts in RNAS service that sometimes were elevated above the propeller arc, and sometimes (in an apparently reckless manner) firing directly through the propeller arc without synchronisation. During the spring and summer of 1915, Captain
Lanoe Hawker Lanoe George Hawker, (30 December 1890 – 23 November 1916) was a British flying ace of the First World War. Having seven credited victories, he was the third pilot to receive the Victoria Cross, the highest decoration for gallantry awar ...
of the Royal Flying Corps, however, had mounted his Lewis gun just forward of the cockpit to fire forwards and outwards, on the left side of his aircraft's fuselage at about a 30° horizontal angle. On 25 July 1915 Captain Hawker flew his Scout C, bearing RFC serial number 1611 against several two-seat German observation aircraft of the '' Fliegertruppe'', and managed to defeat three of them in aerial engagements to earn the first Victoria Cross awarded to a British fighter pilot, while engaged against enemy fixed-wing aircraft.


1915: The Fokker Scourge

The first purpose-designed fighter aircraft included the British
Vickers F.B.5 The Vickers F.B.5 (Fighting Biplane 5) (known as the "Gunbus") was a British two-seat pusher military biplane of the First World War. Armed with a single .303 in (7.7 mm) Lewis gun operated by the observer in the front of the ...
, and machine guns were also fitted to several French types, such as the Morane-Saulnier L and N. Initially the German Air Service lagged behind the Allies in this respect, but this was soon to change dramatically. In July 1915 the
Fokker E.I The Fokker E.I was the first fighter aircraft to enter service with the Fliegertruppe of the Deutsches Heer in World War I. Its arrival at the front in mid-1915 marked the start of a period known as the " Fokker Scourge" during which the E.I a ...
, the first aircraft to enter service with a " synchronisation gear" which enabled a machine gun to fire through the arc of the propeller without striking its blades, became operational. This gave an important advantage over other contemporary fighter aircraft. This aircraft and its immediate successors, collectively known as the '' Eindecker'' (German for " monoplane") – for the first time supplied an effective equivalent to Allied fighters. Two German military aviators, ''Leutnants''
Otto Parschau ''Leutnant'' Otto Parschau (11 November 1890 – 21 July 1916) was a German World War I flying ace and recipient of the Pour le Mérite, Royal House Order of Hohenzollern, and Iron Cross, First Class. He was noted as one of the pre-eminent ac ...
and
Kurt Wintgens ''Leutnant'' Kurt Wintgens (1 August 1894 – 25 September 1916) was a German World War I fighter ace. He was the first military fighter pilot to score a victory over an opposing aircraft, while piloting an aircraft armed with a synchronized ma ...
, worked for the Fokker firm during the spring of 1915, demonstrating the revolutionary feature of the forward-firing synchronised machine gun to the embryonic force of ''Fliegertruppe'' pilots of the German Empire. The first successful engagement involving a synchronised-gun-armed aircraft occurred on the afternoon of July 1, 1915, to the east of
Lunéville Lunéville ( ; German, obsolete: ''Lünstadt'' ) is a commune in the northeastern French department of Meurthe-et-Moselle. It is a subprefecture of the department and lies on the river Meurthe at its confluence with the Vezouze. History L ...
, France when ''Leutnant''
Kurt Wintgens ''Leutnant'' Kurt Wintgens (1 August 1894 – 25 September 1916) was a German World War I fighter ace. He was the first military fighter pilot to score a victory over an opposing aircraft, while piloting an aircraft armed with a synchronized ma ...
, one of the pilots selected by Fokker to demonstrate the small series of five special Eindecker service-test prototype aircraft, forced down a French Morane-Saulnier "Parasol" two seat observation monoplane behind Allied lines with his Fokker M.5K/MG Eindecker production prototype/service-test aircraft, carrying the IdFlieg military serial number "E.5/15". Some 200 shots from the synchronised
Parabellum MG14 The Parabellum MG 14 was a 7.92 mm caliber World War I machine gun built by Deutsche Waffen und Munitionsfabriken. It was a redesign of the Maschinengewehr 08 machine gun (itself an adaptation of the Maxim gun) system intended for use on ai ...
machine gun on Wintgens' aircraft had hit the
Gnome Lambda The Gnome 7 Lambda was a French designed, seven-cylinder, air-cooled rotary aero engine that was produced under license in Britain and Germany. Powering several World War I-era aircraft types it was claimed to produce from its capacity of al ...
rotary engine of the Morane Parasol, forcing it to land safely in Allied territory. By late 1915 the Germans had achieved
air superiority Aerial supremacy (also air superiority) is the degree to which a side in a conflict holds control of air power over opposing forces. There are levels of control of the air in aerial warfare. Control of the air is the aerial equivalent of com ...
, rendering Allied access to the vital intelligence derived from continual aerial reconnaissance more dangerous to acquire. In particular the defencelessness of Allied reconnaissance types was exposed. The first German "ace" pilots, notably
Max Immelmann Max Immelmann (21 September 1890 – 18 June 1916) '' PLM'' was the first German World War I flying ace.Shores, 1983, p. 10. He was a pioneer in fighter aviation and is often mistakenly credited with the first aerial victory using a synch ...
, had begun their careers. The number of actual Allied casualties involved was for various reasons very small compared with the intensive air fighting of 1917–18. The deployment of the Eindeckers was less than overwhelming: the new type was issued in ones and twos to existing reconnaissance squadrons, and it was to be nearly a year before the Germans were to follow the British in establishing specialist fighter squadrons. The Eindecker was also, in spite of its advanced armament, by no means an outstanding aircraft, being closely based on the pre-war
Morane-Saulnier H The Morane-Saulnier H was an early aircraft first flown in France in the months immediately preceding the First World War; it was a single-seat derivative of the successful Morane-Saulnier G with a slightly reduced wingspanTaylor 1989, p.648"The ...
, although it did feature a steel tubing fuselage framework (a characteristic of all Fokker wartime aircraft designs) instead of the wooden fuselage components of the French aircraft. Nonetheless, the impact on morale of the fact that the Germans were effectively fighting back in the air created a major scandal in the British parliament and press. The ascendancy of the Eindecker also contributed to the surprise the Germans were able to achieve at the start of the
Battle of Verdun The Battle of Verdun (french: Bataille de Verdun ; german: Schlacht um Verdun ) was fought from 21 February to 18 December 1916 on the Western Front (World War I), Western Front in France. The battle was the longest of the First World War and ...
because the French reconnaissance aircraft failed to provide their usual cover of the German positions. Fortunately for the Allies, two new British fighters that were a match for the Fokker, the two-seat F.E.2b and the single-seat D.H.2, were already in production. These were both pushers, and could fire forwards without gun synchronisation. The F.E.2b reached the front in September 1915, and the D.H.2 in the following February. On the French front, the tiny
Nieuport 11 The Nieuport 11 (or Nieuport XI C.1 in contemporary sources), nicknamed the ''Bébé'', was a French World War I single seat sesquiplane fighter aircraft, designed by Gustave Delage. It was the primary aircraft that ended the Fokker Scourge i ...
, a tractor biplane with a forward firing gun mounted on the top wing outside the arc of the propeller, also proved more than a match for the German fighter when it entered service in January 1916. With these new types the Allies re-established air superiority in time for the Battle of the Somme, and the "Fokker Scourge" was over. The Fokker E.III, Airco DH-2 and Nieuport 11 were the very first in a long line of single seat fighter aircraft used by both sides during the war. Very quickly it became clear the primary role of fighters would be attacking enemy two-seaters, which were becoming increasingly important as sources of
reconnaissance In military operations, reconnaissance or scouting is the exploration of an area by military forces to obtain information about enemy forces, terrain, and other activities. Examples of reconnaissance include patrolling by troops (skirmishers ...
and artillery observation, while also escorting and defending friendly two-seaters from enemy fighters. Fighters were also used to attack enemy observation balloons, strafe enemy ground targets, and defend friendly airspace from enemy
bomber A bomber is a military combat aircraft designed to attack ground and naval targets by dropping air-to-ground weaponry (such as bombs), launching torpedoes, or deploying air-launched cruise missiles. The first use of bombs dropped from an aircr ...
s. Almost all the fighters in service with both sides, with the exception of the Fokkers' steel-tube fuselaged airframes, continued to use wood as the basic structural material, with fabric-covered wings relying on external wire bracing. However, the first practical all-metal aircraft was produced by
Hugo Junkers Hugo Junkers (3 February 1859 – 3 February 1935) was a German aircraft engineer and aircraft designer who pioneered the design of all-metal airplanes and flying wings. His company, Junkers Flugzeug- und Motorenwerke AG (Junkers Aircraft and Mo ...
, who also used a
cantilever wing A cantilever is a rigid structural element that extends horizontally and is supported at only one end. Typically it extends from a flat vertical surface such as a wall, to which it must be firmly attached. Like other structural elements, a canti ...
structure with a metal covering. The first flight tests of the initial flight demonstrator of this technology, the
Junkers J 1 The Junkers J 1, nicknamed the ''Blechesel'' ("Tin Donkey" or "Sheet Metal Donkey"), was an experimental monoplane aircraft developed by Junkers & Co. It was the world's first all-metal aircraft. Manufactured early on in the First World War, ...
monoplane, took place at the end of 1915 heralding the future of aircraft structural design.


1916: Verdun and the Somme

Creating new units was easier than producing aircraft to equip them, and training pilots to man them. When the Battle of the Somme started in July 1916, most ordinary RFC squadrons were still equipped with planes that proved easy targets for the Fokker. New types such as the
Sopwith 1½ Strutter The Sopwith Strutter was a British single- or two-seat multi-role biplane aircraft of the First World War.Lake 2002, p. 40. It was the first British two-seat tractor fighter and the first British aircraft to enter service with a synchronised ...
had to be transferred from production intended for the RNAS. Even more seriously, replacement pilots were being sent to France with pitifully few flying hours. Nonetheless, air superiority and an "offensive" strategy facilitated the greatly increased involvement of the RFC in the battle itself, in what was known at the time as "trench strafing" – in modern terms, close support. For the rest of the war, this became a regular routine, with both attacking and defending infantry in a land battle being constantly liable to attack by machine guns and light bombs from the air. At this time, counter fire from the ground was far less effective than it became later, when the necessary techniques of
deflection shooting {{unreferenced, date=May 2008 Deflection shooting is a technique of shooting ahead of a moving target, also known as leading the target, so that the projectile will "intercept" and collide with the target at a predicted point. This technique is onl ...
had been mastered. The first step towards specialist fighter-only aviation units within the German military was the establishment of the so-called ''Kampfeinsitzer Kommando'' (single-seat battle unit, abbreviated as "KEK") formations by Inspektor-Major Friedrich Stempel in February 1916. These were based around Eindeckers and other new fighter designs emerging, like the Pfalz E-series monoplanes, that were being detached from their former Feldflieger Abteilung units during the winter of 1915–16 and brought together in pairs and quartets at particularly strategic locations, as "KEK" units were formed at
Habsheim Habsheim is a commune in the Haut-Rhin department in Alsace in north-eastern France. It forms part of the Mulhouse Alsace Agglomération, the inter-communal local government body for the Mulhouse conurbation. History The Thalbahn Habsheim wa ...
, Vaux, Avillers,
Jametz Jametz is a small commune in the Meuse department in Grand Est in north-eastern France, near the Belgian border. Economy Since the 15th century, residents have primarily worked as cattle farmers, cheesemakers, carpenters and leatherworkers. To ...
, and
Cunel Cunel () is a commune in the Meuse department in Grand Est in north-eastern France. Population See also *Communes of the Meuse department The following is a list of the 499 communes of the Meuse department of France. The communes cooperate ...
, as well as other strategic locations along the Western Front to act as ''Luftwachtdienst'' (aerial guard force) units, consisting only of fighters. In a pioneering move in March 1916, German master aerial tactician
Oswald Boelcke Oswald Boelcke PlM (; 19 May 1891 – 28 October 1916) was a World War I German professional soldier and pioneering flying ace credited with 40 aerial victories. Boelcke is honored as the father of the German fighter air force, and of air ...
came up with the idea of having "forward observers" located close to the front lines to spot Allied aircraft approaching the front, to avoid wear and tear on the trio of Fokker Eindecker scout aircraft he had based with his own "KEK" unit based at Sivry-sur-Meuse, just north of Verdun. By April 1916, the
air superiority Aerial supremacy (also air superiority) is the degree to which a side in a conflict holds control of air power over opposing forces. There are levels of control of the air in aerial warfare. Control of the air is the aerial equivalent of com ...
established by the Eindecker pilots and maintained by their use within the KEK formations had long evaporated as the
Halberstadt D.II The Halberstadt D.II was a biplane fighter aircraft developed and manufactured by German aircraft company Halberstädter Flugzeugwerke. It was adopted by the ''Luftstreitkräfte'' (Imperial German Army Air Service) and served through the peri ...
began to be phased in as Germany's first biplane fighter design, with the first Fokker D-series biplane fighters joining the Halberstadts, and a target was set to establish 37 new squadrons in the next 12 months – entirely equipped with single seat fighters, and manned by specially selected and trained pilots, to counter the Allied fighter squadrons already experiencing considerable success, as operated by the Royal Flying Corps and the French ''
Aéronautique Militaire The French Air and Space Force (AAE) (french: Armée de l'air et de l'espace, ) is the air and space force of the French Armed Forces. It was the first military aviation force in history, formed in 1909 as the , a service arm of the French Ar ...
''. The small numbers of questionably built
Fokker D.III The Fokker D.III (Fokker designation M.19) was a German single-seat fighter aircraft of World War I. It saw limited frontline service before being withdrawn from combat in December 1916. Design and development The M.19 began as an effort to imp ...
s posted to the Front pioneered the mounting of twin lMG 08s before 1916's end, as the building numbers of the similarly armed, and much more formidable new twin-gun
Albatros D.I The Albatros D.I was a German fighter aircraft used during World War I. Although its operational career was short, it was the first of the Albatros D types which equipped the bulk of the German and Austrian fighter squadrons ('' Jagdstaffeln'') ...
s were well on the way to establishing the German air superiority marking the first half of 1917. Allied air superiority was maintained during the height of both battles, and the increased effectiveness of Allied air activity proved disturbing to the German Army's top-level ''
Oberste Heeresleitung The ''Oberste Heeresleitung'' (, Supreme Army Command or OHL) was the highest echelon of command of the army (''Heer'') of the German Empire. In the latter part of World War I, the Third OHL assumed dictatorial powers and became the ''de facto' ...
'' command staff. A complete reorganisation of the ''Fliegertruppen des deutschen Kaiserreiches'' into what became officially known as the ''
Luftstreitkräfte The ''Deutsche Luftstreitkräfte'' (, German Air Force)—known before October 1916 as (Flyer Troops)—was the air arm of the Imperial German Army. In English-language sources it is usually referred to as the Imperial German Air Service, alth ...
'' followed and had generally been completed by October 1916. This reorganisation eventually produced the German strategic bombing squadrons that were to produce such consternation in England in 1917 and 1918, and the specialist close support squadrons (''Schlachtstaffeln'') that gave the British infantry such trouble at
Cambrai Cambrai (, ; pcd, Kimbré; nl, Kamerijk), formerly Cambray and historically in English Camerick or Camericke, is a city in the Nord department and in the Hauts-de-France region of France on the Scheldt river, which is known locally as the Es ...
and during the German spring offensive of 1918. Its most famous and dramatic effect, however, involved the raising of specialist fighter squadrons or ''
Jagdstaffeln A ''Jagdstaffel'' (plural ''Jagdstaffeln'', abbreviated to Jasta) was a fighter ''Staffel'' (squadron) of the German Imperial ''Luftstreitkräfte'' during World War I. Background Before April 1916, ''Die Fliegertruppen des deutschen Kaise ...
'' – a full year after similar units had become part of the RFC and the French ''Aéronautique Militaire''. Initially these units were equipped with the
Halberstadt D.II The Halberstadt D.II was a biplane fighter aircraft developed and manufactured by German aircraft company Halberstädter Flugzeugwerke. It was adopted by the ''Luftstreitkräfte'' (Imperial German Army Air Service) and served through the peri ...
(Germany's first biplane fighter), the
Fokker D.I The Fokker D.I (company designation M.18) was a development of the D.II fighter. The D.I was also flown in Austro-Hungarian service as a fighter trainer aircraft under the designation B.III. Confusing the matter further, both the D.II and D.I ar ...
and D.II, along with the last few surviving ''Eindecker''s, all three biplane design types using a single lMG 08, before the Fokker D.III and Albatros D.I twin-gun types arrived at the Front.


1917: Bloody April

The first half of 1917 was a successful period for the ''jagdstaffeln'' and the much larger RFC suffered significantly higher casualties than their opponents. While new Allied fighters such as the Sopwith Pup,
Sopwith Triplane The Sopwith Triplane was a British single seat fighter aircraft designed and manufactured by the Sopwith Aviation Company during the First World War. It has the distinction of being the first military triplane to see operational service. The ...
, and
SPAD S.VII The SPAD S.VII was the first of a series of highly successful biplane fighter aircraft produced by ''Société Pour L'Aviation et ses Dérivés'' (SPAD) during the First World War. Like its successors, the S.VII was renowned as a sturdy and rug ...
were coming into service, at this stage their numbers were small, and suffered from inferior firepower: all three were armed with just a single synchronised Vickers machine gun. On the other hand, the ''jagdstaffeln'' were in the process of replacing their early motley array of equipment with Albatros D-series aircraft, armed with twin synchronised MG08s. The D.I and D.II of late 1916 were succeeded by the new
Albatros D.III The Albatros D.III was a biplane fighter aircraft used by the Imperial German Army Air Service ('' Luftstreitkräfte'') during World War I. A modified licence model was built by Oeffag for the Austro-Hungarian Air Service ( ''Luftfahrtruppen'') ...
, which was, in spite of structural difficulties, "the best fighting scout on the Western Front" at the time. Meanwhile, most RFC two-seater squadrons still flew the
BE.2 The Royal Aircraft Factory B.E.2 was a British single-engine tractor two-seat biplane designed and developed at the Royal Aircraft Factory. Most of the roughly 3,500 built were constructed under contract by private companies, including establish ...
e, a very minor improvement on the BE.2c, and still fundamentally unsuited to air-to-air combat. This culminated in the rout of April 1917, known as "
Bloody April Bloody April was the (largely successful) British air support operation during the Battle of Arras in April 1917, during which particularly heavy casualties were suffered by the Royal Flying Corps at the hands of the German ''Luftstreitkräfte ...
". The RFC suffered particularly severe losses, although Trenchard's policy of "offensive patrol", which placed most combat flying on the German side of the lines, was maintained. During the last half of 1917, the British
Sopwith Camel The Sopwith Camel is a British First World War single-seat biplane fighter aircraft that was introduced on the Western Front in 1917. It was developed by the Sopwith Aviation Company as a successor to the Sopwith Pup and became one of the b ...
and
S.E.5a The Royal Aircraft Factory S.E.5 is a British biplane fighter aircraft of the First World War. It was developed at the Royal Aircraft Factory by a team consisting of Henry Folland, John Kenworthy and Major Frank Goodden. It was one of the ...
and the French
SPAD S.XIII The SPAD S.XIII is a French biplane fighter aircraft of the First World War, developed by ''Société Pour L'Aviation et ses Dérivés'' (SPAD) from the earlier and highly successful SPAD S.VII. During early 1917, the French designer Louis B ...
, all fitted with two forward firing machine guns, became available in numbers. The ordinary two seater squadrons in the RFC received the R.E.8 or the F.K.8, not outstanding warplanes, but far less vulnerable than the BE.2e they replaced. The F.E.2d at last received a worthy replacement in the
Bristol F.2 The Bristol F.2 Fighter is a British First World War two-seat biplane fighter and reconnaissance aircraft developed by Frank Barnwell at the Bristol Aeroplane Company. It is often simply called the Bristol Fighter, ''"Brisfit"'' or ''"Biff"' ...
b. On the other hand, the latest Albatros, the D.V, proved to be a disappointment, as was the
Pfalz D.III The Pfalz D.III was a fighter aircraft used by the ''Luftstreitkräfte'' (Imperial German Air Service) during the First World War. The D.III was the first major original design from Pfalz Flugzeugwerke. Though generally considered inferior to con ...
. The exotic
Fokker Dr.I The Fokker Dr.I (''Dreidecker'', "triplane" in German), often known simply as the Fokker Triplane, was a World War I fighter aircraft built by Fokker-Flugzeugwerke. The Dr.I saw widespread service in the spring of 1918. It became famous as th ...
was plagued, like the Albatros, with structural problems. By the end of the year the air superiority pendulum had swung once more in the Allies' favour.


1918 – the Spring Offensive

The surrender of the Russians and the
Treaty of Brest-Litovsk The Treaty of Brest-Litovsk (also known as the Treaty of Brest in Russia) was a separate peace treaty signed on 3 March 1918 between Russia and the Central Powers ( Germany, Austria-Hungary, Bulgaria, and the Ottoman Empire), that ended Russi ...
in March 1918, and the resulting release of troops from the Eastern Front gave the Germans a "last chance" of winning the war before the Americans could become effectively involved. This resulted in the last great German offensive of the war, the "Spring Offensive", which opened on 21 March. The main attack fell on the British front on the assumption that defeat of the British army would result in the surrender of the mutiny-weakened French. In the air, the battle was marked by the carefully coordinated use of the ''Schlachtstaffeln'' or "battle flights", equipped with the light ''CL'' class two seaters built by the
Halberstadt Halberstadt ( Eastphalian: ''Halverstidde'') is a town in the German state of Saxony-Anhalt, the capital of Harz district. Located north of the Harz mountain range, it is known for its old town center that was greatly destroyed by Allied bombi ...
and Hannover firms, that had proved so effective in the German counter-attack in early October's Battle of Cambrai. The new German fighter aircraft, notably the
Fokker D.VII The Fokker D.VII was a German World War I fighter aircraft designed by Reinhold Platz of the Fokker-Flugzeugwerke. Germany produced around 3,300 D.VII aircraft in the second half of 1918. In service with the '' Luftstreitkräfte'', the D.VII ...
, that might have revived German air superiority in time for this battle had not however reached the ''Jagdstaffeln'' in sufficient numbers, despite its own premier on the Western Front in the mid-Spring of 1918. As with several offensives on both sides, thorough planning and preparation led to initial success, and in fact to deeper penetration than had been achieved by either side since 1914. Many British airfields had to be abandoned to the advancing Germans in a new war of movement. Losses of aircraft and their crew were very heavy on both sides – especially to light anti-aircraft fire. However, by the time of the death of Manfred von Richthofen, the famed Red Baron, on 21 April, the great offensive had largely stalled. The new German fighters had still not arrived, and the British still held general air superiority. The month of April 1918 began with the consolidation of the separate British RFC and RNAS air services into the Royal Air Force, the first independent air arm not subordinate to its national army or navy. By the end of April, the new Fokker, Pfalz and Roland fighters had finally begun to replace the obsolescent equipment of the ''Jagdstaffeln'', but this did not proceed with as much dispatch as it might have, due to increasing shortages of supplies on the side of the Central Powers, and many of the ''Jastas'' still flew Albatros D types at the time of the armistice. The rotary engined
Fokker D.VIII The Fokker E.V was a German parasol-monoplane fighter aircraft designed by Reinhold Platz and built by Fokker-Flugzeugwerke. The E.V was the last Fokker design to become operational with the ''Luftstreitkräfte,'' entering service in the last mon ...
and
Siemens-Schuckert D.IV The Siemens-Schuckert D.IV was a late- World War I fighter aircraft from Siemens-Schuckert (SSW). It reached service too late and was produced in too few numbers to have any effect on the war effort. Earlier designs Siemens-Schuckert's first prod ...
, as well as surviving Fokker Triplanes, suffered from poor reliability and shortened engine life due to the Voltol-based oil that was used to replace scarce
castor oil Castor oil is a vegetable oil pressed from castor beans. It is a colourless or pale yellow liquid with a distinct taste and odor. Its boiling point is and its density is 0.961 g/cm3. It includes a mixture of triglycerides in which abou ...
– captured and salvaged Allied aircraft (especially Sopwith Camels) were scrounged, not only for engines and equipment, but even for their lubricants. Nonetheless, by September, casualties in the RFC had reached the highest level since "Bloody April" – and the Allies were maintaining air superiority by weight of numbers rather than technical superiority.


Readying for battle

1918, especially the second half of the year, also saw the United States increasingly involved with the allied aerial efforts. While American volunteers had been flying in Allied squadrons since the early years of the war, not until 1918 did all-American squadrons begin active operations. Technically America had fallen well behind the European powers in aviation, and no American designed types saw action, with the exception of the Curtiss flying boats. At first, the Americans were supplied with second-rate and obsolete aircraft, such as the Sopwith 1½ Strutter,
Dorand AR The Dorand AR.1 was a World War I French two-seat observation biplane aircraft used by the French Air Force, the American Expeditionary Force and, in small numbers, by Serbian Aviation. Design and development Designed by Captain Georges Lep ...
and Sopwith Camel, and inexperienced American airmen stood little chance against their seasoned opponents. General John J. Pershing assigned Major General Mason Patrick as Chief of the
United States Army Air Service The United States Army Air Service (USAAS)Craven and Cate Vol. 1, p. 9 (also known as the ''"Air Service"'', ''"U.S. Air Service"'' and before its legislative establishment in 1920, the ''"Air Service, United States Army"'') was the aerial war ...
to remedy these issues in May 1918. As numbers grew and equipment improved with the introduction of the twin-gun
Nieuport 28 The Nieuport 28 C.1, a French biplane fighter aircraft flown during World War I, was built by Nieuport and designed by Gustave Delage. Owing its lineage to the successful line of sesquiplane fighters that included the Nieuport 17, the Nie ...
, and later,
SPAD XIII The SPAD S.XIII is a French biplane fighter aircraft of the First World War, developed by ''Société Pour L'Aviation et ses Dérivés'' (SPAD) from the earlier and highly successful SPAD S.VII. During early 1917, the French designer Louis Béc ...
as well as the S.E.5a into American service near the war's end, the Americans came to hold their own in the air; although casualties were heavy, as indeed were those of the French and British, in the last desperate fighting of the war. One of the French twin-seat reconnaissance aircraft used by both the French and the USAAS, was the radial powered Salmson 2 A.2. Leading up to the
Battle of Saint-Mihiel The Battle of Saint-Mihiel was a major World War I battle fought from 12–15 September 1918, involving the American Expeditionary Forces (AEF) and 110,000 French troops under the command of General John J. Pershing of the United States agai ...
, The US Air Service under Maj. Gen. Patrick oversaw the organization of 28 air squadrons for the battle, with the French, British, and Italians contributing additional units to bring the total force numbers to 701 pursuit planes, 366 observation planes, 323 day bombers, and 91 night bombers. The 1,481 total aircraft made it the largest air operation of the war.


Impact

By war's end, the impact of aerial missions on the ground war was in retrospect mainly tactical; strategic bombing, in particular, was still very rudimentary indeed. This was partly due to its restricted funding and use, as it was, after all, a new technology. On the other hand, the artillery, which had perhaps the greatest effect of any military arm in this war, was in very large part as devastating as it was due to the availability of aerial photography and aerial "spotting" by balloon and aircraft. By 1917 weather bad enough to restrict flying was considered as good as "putting the gunner's eyes out". Some, such as then-Brigadier General Billy Mitchell, commander of all American air combat units in France, claimed, " e only damage that has come to ermanyhas been through the air". Mitchell was famously controversial in his view that the future of war was not on the ground or at sea, but in the air. During the course of the War, German aircraft losses accounted to 27,637 by all causes, while ''Entente'' losses numbered over 88,613 lost (52,640 France & 35,973 Great Britain).


Anti-aircraft weaponry

Though aircraft still functioned as vehicles of observation, increasingly they were used as a weapon in themselves.
Dog fight A dogfight, or dog fight, is an aerial battle between fighter aircraft conducted at close range. Dogfighting first occurred in Mexico in 1913, shortly after the invention of the airplane. Until at least 1992, it was a component in every majo ...
s erupted in the skies over the front lines, and aircraft went down in flames. From this air-to-air combat, the need grew for better aircraft and gun armament. Aside from machine guns,
air-to-air rocket An air-to-air rocket or air interception rocket is an unguided projectile fired from aircraft to engage other flying targets. They were used briefly in World War I to engage enemy observation balloons and in and after World War II to engage en ...
s were also used, such as the
Le Prieur rocket ''Le Prieur'' rockets (French ''Fusées Le Prieur'') were a type of incendiary air-to-air rocket used in World War I against observation balloons and airships. They were invented by the French lieutenant Yves Le Prieur and were first used in th ...
against balloons and
airship An airship or dirigible balloon is a type of aerostat or lighter-than-air aircraft that can navigate through the air under its own power. Aerostats gain their lift from a lifting gas that is less dense than the surrounding air. In early ...
s. Recoilless rifles and
autocannon An autocannon, automatic cannon or machine cannon is a fully automatic gun that is capable of rapid-firing large-caliber ( or more) armour-piercing, explosive or incendiary shells, as opposed to the smaller-caliber kinetic projectiles (bul ...
s were also attempted, but they pushed early fighters to unsafe limits while bringing negligible returns, with the German Becker 20mm autocannon being fitted to a few twin-engined ''Luftstreitkräfte'' G-series medium bombers for offensive needs, and at least one late-war ''Kaiserliche Marine'' zeppelin for defense – the uniquely armed
SPAD S.XII The SPAD S.XII or SPAD 12 was a French single-seat biplane fighter aircraft of the First World War developed from the successful SPAD VII by Louis Béchereau, chief designer of the Société Pour L'Aviation et ses Dérivés (SPAD). Development ...
single-seat fighter carried one Vickers machine gun and a special, hand-operated semi-automatic 37mm gun firing through a hollow propeller shaft. Another innovation was air-to-air bombing if a fighter had been fortunate enough to climb higher than an airship. The
Ranken dart The Ranken Dart was an anti-Zeppelin weapon developed during the First World War. It was an air-dropped explosive flechette-type of missile-shaped bomb which was long and wide while being of a steel and wood construcation. It was developed for ...
was designed just for this opportunity. This need for improvement was not limited to air-to-air combat. On the ground, methods developed before the war were being used to deter enemy aircraft from observation and bombing.
Anti-aircraft Anti-aircraft warfare, counter-air or air defence forces is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It includes surface based, ...
artillery rounds were fired into the air and exploded into clouds of smoke and fragmentation, called
archie Archie is a masculine given name, a diminutive of Archibald. It may refer to: People Given name or nickname * Archie Alexander (1888–1958), African-American mathematician, engineer and governor of the US Virgin Islands * Archie Blake (mathemati ...
by the British. Anti-aircraft artillery defenses were increasingly used around observation balloons, which became frequent targets of enemy fighters equipped with special incendiary bullets. Because balloons were so flammable, due to the hydrogen used to inflate them, observers were given parachutes, enabling them to jump to safety. Ironically, only a few aircrew had this option, due in part to a mistaken belief they inhibited aggressiveness, and in part to their significant weight.


First shooting-down of an aeroplane by anti-aircraft artillery

During a bombing raid over Kragujevac on 30 September 1915,
private Private or privates may refer to: Music * " In Private", by Dusty Springfield from the 1990 album ''Reputation'' * Private (band), a Denmark-based band * "Private" (Ryōko Hirosue song), from the 1999 album ''Private'', written and also recorde ...
Radoje Ljutovac Radoje Ljutovac (4 September 1887 – 25 November 1968) was a Serbian soldier from the village of Poljna, Serbia. Private Radoje Ljutovac fought in the First World War in the Serbian Army, and is officially credited with the first shooting do ...
of the Serbian Army successfully shot down one of the three aircraft. Ljutovac used a slightly modified Turkish cannon captured some years previously. This was the first time that a military aeroplane was shot down with
ground-to-air A surface-to-air missile (SAM), also known as a ground-to-air missile (GTAM) or surface-to-air guided weapon (SAGW), is a missile designed to be launched from the ground to destroy aircraft or other missiles. It is one type of anti-aircraft syst ...
artillery Artillery is a class of heavy military ranged weapons that launch munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during sieges, ...
fire, and thus a crucial moment in
anti-aircraft warfare Anti-aircraft warfare, counter-air or air defence forces is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It includes surface based, ...
.


Bombing and reconnaissance

As the stalemate developed on the ground, with both sides unable to advance even a few hundred yards without a major battle and thousands of casualties, aircraft became greatly valued for their role gathering intelligence on enemy positions and bombing the enemy's supplies behind the trench lines. Large aircraft with a pilot and an observer were used to scout enemy positions and bomb their supply bases. Because they were large and slow, these aircraft made easy targets for enemy fighter aircraft. As a result, both sides used fighter aircraft to both attack the enemy's two-seat aircraft and protect their own while carrying out their missions. While the two-seat bombers and reconnaissance aircraft were slow and vulnerable, they were not defenseless. Two-seaters had the advantage of both forward- and rearward-firing guns. Typically, the pilot controlled fixed guns behind the propeller, similar to guns in a fighter aircraft, while the observer controlled one with which he could cover the arc behind the aircraft. A tactic used by enemy fighter aircraft to avoid fire from the rear gunner was to attack from slightly below the rear of two-seaters, as the tail gunner was unable to fire below the aircraft. However, two-seaters could counter this tactic by going into a dive at high speeds. Pursuing a diving two-seater was hazardous for a fighter pilot, as it would place the fighter directly in the rear gunner's line of fire; several high scoring aces of the war were shot down by "lowly" two-seaters, including Raoul Lufbery,
Erwin Böhme Erwin Böhme (29 July 1879 – 29 November 1917), PlM, was a German World War I fighter ace credited with 24 aerial victories. He was born in Holzminden on 28 July 1879. Both studious and athletic, he became a champion swimmer, proficient ice sk ...
, and Robert Little. Even Manfred von Richthofen, the highest scoring ace of WWI, was once wounded and forced to crash land from the bullets of a two-seater, though he did survive the encounter and continued flying after he recovered.


Strategic bombing

The first aerial bombardment of civilians occurred during World War I. In the opening weeks of the war, zeppelins bombed Liège,
Antwerp Antwerp (; nl, Antwerpen ; french: Anvers ; es, Amberes) is the largest city in Belgium by area at and the capital of Antwerp Province in the Flemish Region. With a population of 520,504,
, and Warsaw, and other cities, including Paris and Bucharest, were targeted, In January 1915 the Germans began a bombing campaign against England that was to last until 1918, initially using airships. There were 19 raids in 1915, in which 37 tons of bombs were dropped, killing 181 people and injuring 455. Raids continued in 1916. London was accidentally bombed in May, and in July, the
Kaiser ''Kaiser'' is the German word for " emperor" (female Kaiserin). In general, the German title in principle applies to rulers anywhere in the world above the rank of king (''König''). In English, the (untranslated) word ''Kaiser'' is mainly a ...
allowed directed raids against urban centres. There were 23 airship raids in 1916 in which 125 tons of ordnance were dropped, killing 293 people and injuring 691. Gradually British air defenses improved. In 1917 and 1918 there were only eleven Zeppelin raids against England, and the final raid occurred on 5 August 1918, resulting in the death of
Peter Strasser Peter Strasser (1 April 1876 – 5 August 1918) was chief commander of German Imperial Navy Zeppelins during World War I, the main force operating bombing campaigns from 1915 to 1917. He was killed when flying the German Empire's last airsh ...
, commander of the German Naval Airship Department. By the end of the war, 54 airship raids had been undertaken, in which 557 people were killed and 1,358 injured. Of the 80 airships used by the Germans in World War I, 34 were shot down and further 33 were destroyed by accidents. 389 crewmen died. The Zeppelin raids were complemented by the
Gotha G ''Gothaer Waggonfabrik'' (''Gotha'', GWF) was a German manufacturer of rolling stock established in the late nineteenth century at Gotha. During the two world wars, the company expanded into aircraft building. World War I In World War I, Go ...
bombers from 1917, which were the first heavier than air bombers to be used for
strategic bombing Strategic bombing is a military strategy used in total war with the goal of defeating the enemy by destroying its morale, its economic ability to produce and transport materiel to the theatres of military operations, or both. It is a systematica ...
, and by a small force of five Zeppelin-Staaken R.VI "giant" four engined bombers from late September 1917 through to mid-May 1918. Twenty-four Gotha twin-engined bombers were shot down on the raids over England, with no losses for the Zeppelin-Staaken giants. Further 37 Gotha bombers crashed in accidents. They dropped 73 tons of bombs, killing 857 people and wounding 2058. It has been argued that the raids were effective far beyond material damage in diverting and hampering wartime production, and diverting twelve squadrons and over 17,000 men to air defenses.Ben Walsh AQA GCSE Modern World History p296 Calculations performed on the number of dead to the weight of bombs dropped had a profound effect on attitudes of the British government and population in the interwar years, who believed that "
The bomber will always get through "The bomber will always get through" was a phrase used by Stanley Baldwin in a 1932 speech "A Fear for the Future" given to the British Parliament. His speech stated that contemporary bomber aircraft had the performance necessary to conduct a st ...
".


Observation balloons

Manned observation balloons floating high above the trenches were used as stationary reconnaissance points on the front lines, reporting enemy troop positions and directing artillery fire. Balloons commonly had a crew of two equipped with parachutes: upon an enemy air attack on the flammable balloon, the crew would parachute to safety. Recognized for their value as observer platforms, observation balloons were important targets of enemy aircraft. To defend against air attack, they were heavily protected by large concentrations of antiaircraft guns and patrolled by friendly aircraft. Blimps and balloons helped contribute to the stalemate of the trench warfare of World War I, and contributed to air-to-air combat for air superiority because of their significant reconnaissance value. To encourage pilots to attack enemy balloons, both sides counted downing an enemy balloon as an "air-to-air" kill, with the same value as shooting down an enemy aircraft. Some pilots, known as
balloon buster Balloon busters were military pilots known for destroying enemy observation balloons. These pilots were noted for their fearlessness, as balloons were stationary targets able to receive heavy defenses, from the ground and the air. Seventy-seven fl ...
s, became particularly distinguished by their prowess at shooting down enemy balloons. The premier balloon busting ace was
Willy Coppens Willy Omer François Jean baron Coppens de Houthulst (6 July 1892 – 21 December 1986) was Belgium's leading fighter ace and the champion " balloon buster" of World War I. He was credited with 37 confirmed victories and six probables. Earl ...
: 35 of his 37 victories were enemy balloons.


Leading aces

As pioneer aviators invented air-to-air combat, the contending sides developed various methods of tracking aerial casualties and victories. Aviators with five or more aerial victories confirmed by their parent air service were dubbed "aces". Their numbers would burgeon, until by war's end, there were over 1,800 aces. The following aces scored the most victories for their respective air services.


Pioneers of aerial warfare

The following aviators were the first to reach important milestones in the development of aerial combat during World War I:


Aircraft

* Aircraft of the Entente Powers * Aircraft of the Central Powers


See also

*
Biggles James Bigglesworth, nicknamed "Biggles", is a fictional pilot and adventurer, the title character and hero of the ''Biggles'' series of adventure books, written for young readers by W. E. Johns (1893–1968). Biggles made his first appearanc ...
a fictional WWI aviator *
Biplane A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first powered, controlled aeroplane to fly, the Wright Flyer, used a biplane wing arrangement, as did many aircraft in the early years of aviation. While a ...
* Dogfight * * History of aerial warfare *
History of aviation The history of aviation extends for more than two thousand years, from the earliest forms of aviation such as kites and attempts at tower jumping to supersonic and hypersonic flight by powered, heavier-than-air jets. Kite flying in China ...
*
List of American aero squadrons This is a partial list of original Air Service, United States Army "Aero Squadrons" before and during World War I. Units formed after 1 January 1919, are not listed. Aero Squadrons were the designation of the first United States Army aviatio ...
* List of Royal Air Force aircraft squadrons * List of Royal Flying Corps squadrons *
Lists of World War I flying aces The following are lists of World War I flying aces. Historically, a flying ace was defined as a military aviator credited with shooting down five or more enemy aircraft during aerial combat. The term was first used by French newspapers, describ ...


Notes


References

*Editors of ''American Heritage''. ''History of WW1''. Simon & Schuster, 1964. *Cheesman, E.F. (ed.) ''Fighter Aircraft of the 1914–1918 War''. Letchworth, UK: Harleyford, 1960 *''The Great War'', television documentary by the
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. *Gray, Peter & Thetford, Owen ''German Aircraft of the First World War''. London, Putnam, 1962. * Guttman, Jon. ''Pusher Aces of World War 1: Volume 88 of Osprey Aircraft of the Aces: Volume 88 of Aircraft of the Aces.'' Osprey Publishing, 2009. , *Herris, Jack & Pearson, Bob ''Aircraft of World War I''. London, Amber Books, 2010. . *Jackson, Peter ''The Guinness Book of Air Warfare''. London, Guinness Publishing, 1993. *Morrow, John. ''German Air Power in World War I''. Lincoln: University of Nebraska Press, 1982. Contains design and production figures, as well as economic influences. *Pearson, George, ''Aces: A Story of the First Air War'', historical advice by Brereton Greenhous and Philip Markham, NFB, 1993. Contains assertion aircraft created trench stalemate. *Terraine, John ''White Heat: the new warfare 1914–18''. London, Guild Publishing, 1982 * VanWyngarden, Greg. ''Early German Aces of World War I: Volume 73 of Aircraft of the Aces.'' Osprey Publishing, 2006. , . *Winter, Denis. ''First of the Few''. London: Allen Lane/Penguin, 1982. Coverage of the British air war, with extensive bibliographical notes.


External links

* Wells, Mark
Aircraft, Fighter and Pursuit
in
1914-1918-online. International Encyclopedia of the First World War
* Morris, Craig
Aircraft, Reconnaissance and Bomber
in
1914-1918-online. International Encyclopedia of the First World War
* Mahoney, Ross & Pugh, James
Air Warfare
in
1914-1918-online. International Encyclopedia of the First World War


at centennialofflight.gov *
The United States Air Service in World War I
– usaww1.com
The League of World War I Aviation Historians and Over the Front Magazine
– overthefront.com

* ttps://www.youtube.com/channel/UCoFmWGVLopzrLxNaMI-Xnsg 1989 WWI aviation documentary featuring interviews with the last three surviving American aces– YouTube {{DEFAULTSORT:Aviation In World War I World War I Articles containing video clips