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Technology during World War I (1914–1918) reflected a trend toward industrialism and the application of mass-production methods to
weapon A weapon, arm or armament is any implement or device that can be used to deter, threaten, inflict physical damage, harm, or kill. Weapons are used to increase the efficacy and efficiency of activities such as hunting, crime, law enforcement, s ...
s and to the technology of warfare in general. This trend began at least fifty years prior to
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...
during the
American Civil War The American Civil War (April 12, 1861 – May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States. It was fought between the Union (American Civil War), Union ("the North") and t ...
of 1861–1865, and continued through many smaller conflicts in which soldiers and strategists tested new weapons. World War I weapons included types standardised and improved over the preceding period, together with some newly developed types using innovative
technology Technology is the application of knowledge to reach practical goals in a specifiable and reproducible way. The word ''technology'' may also mean the product of such an endeavor. The use of technology is widely prevalent in medicine, scien ...
and a number of improvised weapons used in trench warfare.
Military technology Military technology is the application of technology for use in warfare. It comprises the kinds of technology that are distinctly military in nature and not civilian in application, usually because they lack useful or legal civilian application ...
of the time included important innovations in
machine gun A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles ...
s,
grenade 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 ge ...
s, and artillery, along with essentially new weapons such as
submarine A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely op ...
s,
poison gas Many gases have toxic properties, which are often assessed using the LC50 (median lethal dose) measure. In the United States, many of these gases have been assigned an NFPA 704 health rating of 4 (may be fatal) or 3 (may cause serious or perma ...
, warplanes and tanks. The earlier years of the First World War could be characterized as a clash of 20th-century
technology Technology is the application of knowledge to reach practical goals in a specifiable and reproducible way. The word ''technology'' may also mean the product of such an endeavor. The use of technology is widely prevalent in medicine, scien ...
with 19th-century military science creating ineffective battles with huge numbers of casualties on both sides. On land, the quick descent into trench warfare came as a surprise, and only in the final year of the war did the major armies make effective steps in revolutionizing matters of command and control and tactics to adapt to the modern battlefield and start to harness the myriad new technologies to effective military purposes. Tactical reorganizations (such as shifting the focus of command from the 100+ man
company A company, abbreviated as co., is a legal entity representing an association of people, whether natural, legal or a mixture of both, with a specific objective. Company members share a common purpose and unite to achieve specific, declared ...
to the 10+ man squad) went hand-in-hand with armoured cars, the first submachine guns, and automatic rifles that a single individual soldier could carry and use.


Trench warfare

The new metallurgical and chemical industries created new firepower that briefly simplified defense before novel approaches to attack evolved. The application of infantry
rifle A rifle is a long-barreled firearm designed for accurate shooting, with a barrel that has a helical pattern of grooves ( rifling) cut into the bore wall. In keeping with their focus on accuracy, rifles are typically designed to be held with ...
s, rifled
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 si ...
with hydraulic recoil mechanisms, barbed wire, zigzag trenches and
machine gun A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles ...
s made it difficult or nearly impossible to cross defended ground. The hand grenade, long used in crude form, developed rapidly as an aid in attacking trenches. Probably the most important was the introduction of high explosive shells, which dramatically increased the lethality of artillery over the 19th-century equivalents. Trench warfare led to the development of the concrete pill box, a small, hardened blockhouse that could be used to deliver machine gun fire. Pillboxes could be placed across a battlefield with interlocking fields of fire. Because attacking an entrenched enemy was so difficult, tunnel warfare became a major effort during the war. Once enemy positions were undermined, huge amounts of explosives would be planted and detonated as part preparation for an overland charge. Sensitive listening devices that could detect the sounds of digging were a crucial method of defense against these underground incursions. The British proved especially adept at these tactics, thanks to the skill of their tunnel-digging "
sapper A sapper, also called a pioneer or combat engineer, is a combatant or soldier who performs a variety of military engineering duties, such as breaching fortifications, demolitions, bridge-building, laying or clearing minefields, preparin ...
s" and the sophistication of their listening devices. During the war, the immobility of trench warfare and a need for protection from
sniper A sniper is a military/paramilitary marksman who engages targets from positions of concealment or at distances exceeding the target's detection capabilities. Snipers generally have specialized training and are equipped with high-precision r ...
s created a requirement for
loopholes A loophole is an ambiguity or inadequacy in a system, such as a law or security, which can be used to circumvent or otherwise avoid the purpose, implied or explicitly stated, of the system. Originally, the word meant an arrowslit, a narrow verti ...
both for discharging firearms and for observation.Trench Loopholes, Le Linge
/ref> Often a steel plate was used with a "key hole", which had a rotating piece to cover the loophole when not in use.


Clothing

The British and German armies had already changed from red coat (British army) (1902) or Prussian blue (1910) for field uniforms, to less conspicuous khaki or field gray. Adolphe Messimy, Joseph Gallieni and other French leaders had proposed following suit, but the French army marched to war in their traditional red trousers, and only began receiving the new " horizon blue" ones in 1915. A type of raincoat for British officers, introduced long before the war, gained fame as the
trench coat A trench coat or trenchcoat is a variety of coat made of waterproof heavy-duty fabric, originally developed for British Army officers before the First World War, and becoming popular while used in the trenches. Originally made from gabardin ...
. The principal armies entered the war under cloth caps or leather helmets. They hastened to develop new
steel helmet A combat helmet or battle helmet is a type of helmet. It is a piece of personal armor designed specifically to protect the head during combat. Modern combat helmets are mainly designed to protect from shrapnel and fragments, offer some protec ...
s, in designs that became icons of their respective countries.


Observation trees

Observing the enemy in trench warfare was difficult, prompting the invention of technology such as the
camouflage tree Camouflage trees (also known as fake trees, false trees, and observation trees) were observation posts invented in 1915 by French painter Lucien-Victor Guirand de Scevola while leading the French army's ''Section de Camouflage''. They were used ...
, a man made observation tower that enables forces to discreetly observe their enemy.


Artillery

In the 19th century, Britain and France exploited the rapid technical developments in
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 si ...
to serve a War of Movement. Such weapons served well in the colonial wars of that century, and served Germany very well in the Franco-Prussian War, but trench warfare was more like a
siege A siege is a military blockade of a city, or fortress, with the intent of conquering by attrition, or a well-prepared assault. This derives from la, sedere, lit=to sit. Siege warfare is a form of constant, low-intensity conflict characteriz ...
, and called for
siege gun Siege artillery (also siege guns or siege cannons) are heavy guns designed to bombard fortifications, cities, and other fixed targets. They are distinct from field artillery and are a class of siege weapon capable of firing heavy cannonballs o ...
s. The German army had already anticipated that a European war might require heavier artillery, hence had a more appropriate mix of sizes. Foundries responded to the actual situation with more heavy products and fewer highly mobile pieces. Germany developed the Paris guns of stupendous size and range. However, the necessarily stupendous muzzle velocity wore out a gun barrel after a few shots requiring a return to the factory for relining, so these weapons served more to frighten and anger urban people than to kill them or devastate their cities. At the beginning of the war, artillery was often sited in the front line to fire over open sights at enemy infantry. During the war, the following improvements were made: * Indirect counter-battery fire was developed for the first time * Forward observers were used to direct artillery positioned out of direct line of sight from the targets, and sophisticated communications and fire plans were developed *
Artillery sound ranging In land warfare, artillery sound ranging is a method of determining the coordinates of a hostile battery using data derived from the sound of its guns (or mortar or rockets) firing. The same methods can also be used to direct artillery fire at ...
and flash spotting, for the location and eventual destruction of enemy batteries * Factors such as weather, air temperature, and barrel wear could for the first time be accurately measured and taken into account for
indirect fire Indirect fire is aiming and firing a projectile without relying on a direct line of sight between the gun and its target, as in the case of direct fire. Aiming is performed by calculating azimuth and inclination, and may include correcting aim ...
*The first "box barrage" in history was fired in the Battle of Neuve Chapelle in 1915; this was the use of a three- or four-sided curtain of shell-fire to prevent the movement of enemy infantry * The creeping barrage was perfected * The wire-cutting No. 106 fuze was developed, specifically designed to explode on contact with barbed wire, or the ground before the shell buried itself in mud, and equally effective as an anti-personnel weapon * The first anti-aircraft guns were devised out of necessity Field artillery entered the war with the idea that each gun should be accompanied by hundreds of shells, and armouries ought to have about a thousand on hand for resupply. This proved utterly inadequate when it became commonplace for a gun to sit in one place and fire a hundred shells or more per day for weeks or months on end. To meet the resulting
Shell Crisis of 1915 The Shell Crisis of 1915 was a shortage of artillery shells on the front lines in the First World War that led to a political crisis in the United Kingdom. Previous military experience led to an over-reliance on shrapnel to attack infantry in ...
, factories were hastily converted from other purposes to make more ammunition. Railways to the front were expanded or built, leaving the question of the last mile. Horses in World War I were the main answer, and their high death rate seriously weakened the Central Powers late in the war. In many places the newly invented trench railways helped. The new motor
truck A truck or lorry is a motor vehicle designed to transport cargo, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame constructi ...
s as yet lacked pneumatic tires, versatile suspension, and other improvements that in later decades would allow them to perform well. The majority of casualties inflicted during the war were the result of artillery fire.


Poison gas

Chemical weapons were first used systematically in this war. Chemical weapons in World War I included
phosgene Phosgene is the organic chemical compound with the formula COCl2. It is a toxic, colorless gas; in low concentrations, its musty odor resembles that of freshly cut hay or grass. Phosgene is a valued and important industrial building block, esp ...
,
tear gas Tear gas, also known as a lachrymator agent or lachrymator (), sometimes colloquially known as "mace" after the early commercial aerosol, is a chemical weapon that stimulates the nerves of the lacrimal gland in the eye to produce tears. In ...
, chlorarsines and
mustard gas Mustard gas or sulfur mustard is a chemical compound belonging to a family of cytotoxic and blister agents known as mustard agents. The name ''mustard gas'' is technically incorrect: the substance, when dispersed, is often not actually a gas, ...
. At the beginning of the war, Germany had the most advanced chemical industry in the world, accounting for more than 80% of the world's dye and chemical production. Although the use of poison gas had been banned by the
Hague Conventions of 1899 and 1907 The Hague Conventions of 1899 and 1907 are a series of international treaties and declarations negotiated at two international peace conferences at The Hague in the Netherlands. Along with the Geneva Conventions, the Hague Conventions were am ...
,
Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwee ...
turned to this industry for what it hoped would be a decisive weapon to break the deadlock of trench warfare.
Chlorine Chlorine is a chemical element with the symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine i ...
gas was first used on the battlefield in April 1915 at the Second Battle of Ypres in
Belgium Belgium, ; french: Belgique ; german: Belgien officially the Kingdom of Belgium, is a country in Northwestern Europe. The country is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeast, France to ...
. The unknown gas appeared to be a simple smoke screen, used to hide attacking soldiers, and Allied troops were ordered to the front trenches to repel the expected attack. The gas had a devastating effect, killing many defenders or, when the wind direction changed and blew the gas back, many attackers. The wind being unreliable, another way had to be found to transmit the gas. It began being delivered in artillery shells. Later,
mustard gas Mustard gas or sulfur mustard is a chemical compound belonging to a family of cytotoxic and blister agents known as mustard agents. The name ''mustard gas'' is technically incorrect: the substance, when dispersed, is often not actually a gas, ...
,
phosgene Phosgene is the organic chemical compound with the formula COCl2. It is a toxic, colorless gas; in low concentrations, its musty odor resembles that of freshly cut hay or grass. Phosgene is a valued and important industrial building block, esp ...
and other gasses were used. Britain and France soon followed suit with their own gas weapons. The first defenses against gas were makeshift, mainly rags soaked in water or
urine Urine is a liquid by-product of metabolism in humans and in many other animals. Urine flows from the kidneys through the ureters to the urinary bladder. Urination results in urine being excreted from the body through the urethra. Cellul ...
. Later, relatively effective
gas mask A gas mask is a mask used to protect the wearer from inhaling airborne pollutants and toxic gases. The mask forms a sealed cover over the nose and mouth, but may also cover the eyes and other vulnerable soft tissues of the face. Most gas mas ...
s were developed, and these greatly reduced the effectiveness of gas as a weapon. Although it sometimes resulted in brief tactical advantages and probably caused over 1,000,000 casualties, gas seemed to have had no significant effect on the course of the war. Chemical weapons were easily attained, and cheap. Gas was especially effective against troops in trenches and bunkers that protected them from other weapons. Most chemical weapons attacked an individual's respiratory system. The concept of choking easily caused fear in soldiers and the resulting terror affected them psychologically. Because there was such a great fear of chemical weapons it was not uncommon that a soldier would panic and misinterpret symptoms of the common cold as being affected by a poisonous gas.


Command and control

The introduction of radio telegraphy was a significant step in communication during World War I. The stations utilized at that time were
spark-gap transmitter A spark-gap transmitter is an obsolete type of transmitter, radio transmitter which generates radio waves by means of an electric spark."Radio Transmitters, Early" in Spark-gap transmitters were the first type of radio transmitter, and were the m ...
s. As an example, the information of the start of World War I was transmitted to German South West Africa on 2 August 1914 via radio telegraphy from the Nauen transmitter station via a relay station in Kamina and Lomé in
Togo Togo (), officially the Togolese Republic (french: République togolaise), is a country in West Africa. It is bordered by Ghana to the west, Benin to the east and Burkina Faso to the north. It extends south to the Gulf of Guinea, where its c ...
to the radio station in Windhoek. In the early days of the war, generals tried to direct tactics from headquarters many miles from the front, with messages being carried back and forth by runners or motorcycle couriers. It was soon realized that more immediate methods of communication were needed.
Radio Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30  hertz (Hz) and 300  gigahertz (GHz). They are generated by an electronic device called a tr ...
sets of the period were too heavy to carry into battle, and field telephone lines laid were quickly broken. Either one was subject to eavesdropping, and trench codes were not very satisfactory. Runners, flashing lights, and mirrors were often used instead; dogs were also used, but were only used occasionally as troops tended to adopt them as pets and men would volunteer to go as runners in the dog's place. There were also
aircraft An aircraft is a vehicle that is able to flight, fly by gaining support from the Atmosphere of Earth, air. It counters the force of gravity by using either Buoyancy, static lift or by using the Lift (force), dynamic lift of an airfoil, or in ...
(called "contact patrols") that carried messages between headquarters and forward positions, sometimes dropping their messages without landing. Technical advances in radio, however, continued during the war and radio telephony was perfected, being most useful for airborne artillery spotters. The new long-range artillery developed just before the war now had to fire at positions it could not see. Typical tactics were to pound the enemy front lines and then stop to let infantry move forward, hoping that the enemy line was broken, though it rarely was. The lifting and then the creeping barrage were developed to keep artillery fire landing directly in front of the infantry "as it advanced." Communications being impossible, the danger was that the barrage would move too fast — losing the protection — or too slowly — holding up the advance. There were also countermeasures to these artillery tactics: by aiming a counter barrage directly behind an enemy's creeping barrage, one could target the infantry that was following the creeping barrage. Microphones ( Sound ranging) were used to triangulate the position of enemy guns and engage in counter-battery fire. Muzzle flashes of guns could also be spotted and used to target enemy artillery.


Railways

Railways dominated in this war as in no other. The German strategy was known beforehand by the Allies simply because of the vast marshaling yards on the Belgian border that had no other purpose than to deliver the mobilized German army to its start point. The German mobilization plan was little more than a vast detailed railway timetable. Men and material could get to the front at an unprecedented rate by rail, but trains were vulnerable at the front itself. Thus, armies could only advance at the pace that they could build or rebuild a railway, e.g. the British advance across Sinai. Motorized transport was only extensively used in the last two years of World War I. After the rail head, troops moved the last mile on foot, and guns and supplies were drawn by horses and trench railways. Railways lacked the flexibility of motor transport and this lack of flexibility percolated through into the conduct during the war.


War of attrition

The countries involved in the war applied the full force of industrial mass-production to the manufacture of weapons and ammunition, especially artillery shells. Women on the home-front played a crucial role in this by working in munitions factories. This complete mobilization of a nation's resources, or "
total war Total war is a type of warfare that includes any and all civilian-associated resources and infrastructure as legitimate military targets, mobilizes all of the resources of society to fight the war, and gives priority to warfare over non-com ...
" meant that not only the armies, but also the economies of the warring nations were in competition. For a time, in 1914–1915, some hoped that the war could be won through an attrition of
materiel Materiel (; ) refers to supplies, equipment, and weapons in military supply-chain management, and typically supplies and equipment in a commercial supply chain context. In a military context, the term ''materiel'' refers either to the spec ...
—that the enemy's supply of artillery shells could be exhausted in futile exchanges. But production was ramped up on both sides and hopes proved futile. In Britain the
Shell Crisis of 1915 The Shell Crisis of 1915 was a shortage of artillery shells on the front lines in the First World War that led to a political crisis in the United Kingdom. Previous military experience led to an over-reliance on shrapnel to attack infantry in ...
brought down the British government, and led to the building of HM Factory, Gretna, a huge munitions factory on the English-Scottish border. The war of attrition then focused on another resource: human lives. In the Battle of Verdun in particular, German Chief of Staff
Erich Von Falkenhayn General Erich Georg Sebastian Anton von Falkenhayn (11 September 1861 – 8 April 1922) was the second Chief of the German General Staff of the First World War from September 1914 until 29 August 1916. He was removed on 29 August 1916 after ...
hoped to "bleed France white" through repeated attacks on this French city. In the end, the war ended through a combination of attrition (of men and material), advances on the battlefield, arrival of American troops in large numbers, and a breakdown of morale and production on the German home-front due to an effective
naval blockade A navy, naval force, or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operations and related functions. It include ...
of her seaports.


Air warfare

Aviation in World War I started with primitive aircraft, primitively used. Technological progress was swift, leading to ground attack,
tactical bombing Tactical bombing is aerial bombing aimed at targets of immediate military value, such as combatants, military installations, or military equipment. This is in contrast to strategic bombing, or attacking enemy cities and factories to crippl ...
, and highly publicized, deadly dogfights among aircraft equipped with forward-firing, synchronized
machine gun A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles ...
s from July 1915 onwards. However, these uses made a lesser impact on the war than more mundane roles in intelligence, sea patrol and especially artillery spotting. Antiaircraft warfare also had its beginnings in this war. As with most technologies, aircraft and their use underwent many improvements during World War I. As the initial war of movement on the Western Front settled into trench warfare,
aerial reconnaissance Aerial reconnaissance is reconnaissance for a military or strategic purpose that is conducted using reconnaissance aircraft. The role of reconnaissance can fulfil a variety of requirements including artillery spotting, the collection of im ...
over the front added to the difficulty of mounting surprise attacks against entrenched and concealed defenders. Manned observation balloons floating high above the trenches were used as stationary observation posts, reporting enemy troop positions and directing artillery fire. Balloons commonly had a crew of two, each equipped with parachutes: upon an enemy air attack on the flammable balloon, the crew would jump to safety. At the time, parachutes were too heavy to be used by pilots in aircraft, and smaller versions would not be developed until the end of the war. (In the British case, there arose concerns that they might undermine morale, effectively encouraging cowardice.) 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 anti-aircraft guns and patrolled by friendly aircraft. While early air spotters were unarmed, they soon began firing at each other with handheld weapons. An arms race commenced, quickly leading to increasingly agile planes equipped with machine guns. A key innovation was the interrupter gear, a Dutch invention that allowed a machine gun to be mounted behind the propeller so the pilot could fire directly ahead, along the plane's flight path. As the stalemate developed on the ground, with both sides unable to advance even a few miles without a major battle and thousands of casualties, planes became greatly valued for their role gathering intelligence on enemy positions. They also bombed enemy supplies behind the trench lines, in the manner of later
attack aircraft An attack aircraft, strike aircraft, or attack bomber is a tactical military aircraft that has a primary role of carrying out airstrikes with greater precision than bombers, and is prepared to encounter strong low-level air defenses while pre ...
. Large planes with a pilot and an observer were used to reconnoiter enemy positions and bomb their supply bases. These large and slow planes made easy targets for enemy fighter planes, who in turn were met by
fighter escort The escort fighter was a concept for a fighter aircraft designed to escort bombers to and from their targets. An escort fighter needed range long enough to reach the target, loiter over it for the duration of the raid to defend the bombers, and ...
s and spectacular aerial dogfights. German strategic bombing during World War I struck Warsaw, Paris, London and other cities. Germany led the world in
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, pp ...
s, and used these airships to make occasional bombing raids on military targets, London and other British cities, without great effect. Later in the war, Germany introduced long range
strategic bomber A strategic bomber is a medium- to long-range Penetrator (aircraft), penetration bomber aircraft designed to drop large amounts of air-to-ground weaponry onto a distant target for the purposes of debilitating the enemy's capacity to wage war. Unl ...
s. Damage was again minor but they forced the British air forces to maintain squadrons of fighters in England to defend against air attack, depriving the British Expeditionary Force of planes, equipment, and personnel badly needed on the Western front. The Allies made much smaller efforts in bombing the Central Powers.


Mobility

In the early days of the war, armoured cars armed with machine guns were organized into combat units, along with cyclist infantry and machine guns mounted on motor cycle sidecars. Though not able to assault entrenched positions, they provided mobile fire support to infantry, and performed scouting, reconnaissance, and other roles similar to cavalry. After trench warfare took hold of major battle-lines, opportunities for such vehicles greatly diminished, though they continued to see use in the more open campaigns in Russia and the Middle East. Between late 1914 and early 1918, the Western Front hardly moved. When the
Russian Empire The Russian Empire was an empire and the final period of the Russian monarchy from 1721 to 1917, ruling across large parts of Eurasia. It succeeded the Tsardom of Russia following the Treaty of Nystad, which ended the Great Northern War ...
surrendered after the
October Revolution The October Revolution,. officially known as the Great October Socialist Revolution. in the Soviet Union, also known as the Bolshevik Revolution, was a revolution in Russia led by the Bolshevik Party of Vladimir Lenin that was a key mom ...
in 1917, Germany was able to move many troops to the Western Front. With new
stormtrooper Stormtrooper or storm trooper may refer to: Military *Stormtroopers (Imperial Germany), specialist soldier of the German Army in World War I *''Sturmabteilung'' (SA) or Storm Detachment, a paramilitary organization of the German Nazi Party *8th In ...
infantry trained in infiltration tactics to exploit enemy weak points and penetrate into rear areas, they launched a series of offensives in the spring of 1918. In the largest of these, Operation Michael, General Oskar von Hutier pushed forward 60 kilometers, gaining in a couple weeks what France and Britain had spent years to achieve. Although initially successful tactically, these offensives stalled after outrunning their horse-drawn supply, artillery, and reserves, leaving German forces weakened and exhausted. In the Battle of Amiens of August 1918, the Triple Entente forces began a counterattack that would be called the " Hundred Days Offensive." The Australian and Canadian divisions that spearheaded the attack managed to advance 13 kilometers on the first day alone. These battles marked the end of trench warfare on the Western Front and a return to mobile warfare. The
mobile personnel shield A mobile personnel shield is a type of bulletproof shield equipped with wheels. Such devices were employed experimentally during the trench warfare of World War I. The immobility of the trench warfare characterizing the First World War led to a ...
was a less successful attempt at restoring mobility.Gougaud, p.110 After the war, the defeated Germans would seek to combine their infantry-based mobile warfare of 1918 with vehicles, eventually leading to '' blitzkrieg'', or 'lightning warfare'.


Tanks

Although the concept of the
tank A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and good battlefield mobility provided by tracks and a powerful ...
had been suggested as early as the 1890s, authorities showed little more than a passing interest in them until the trench stalemate of World War I caused reconsideration. In early 1915, the British
Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against Fr ...
and French industrialists both started dedicated development of tanks. Basic tank design combined several existing technologies. It included
armour plating Military vehicles are commonly armoured (or armored; see spelling differences) to withstand the impact of shrapnel, bullets, shells, rockets, and missiles, protecting the personnel inside from enemy fire. Such vehicles include armoured fightin ...
thick enough to be proof against all standard infantry arms, caterpillar track for mobility over the shell-torn battlefield, the four-stroke gasoline powered
internal combustion engine An internal combustion engine (ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal co ...
(refined in the 1870s), and heavy firepower, provided by the same machine guns which had recently become so dominant in warfare, or even light artillery guns. In Britain, a
committee A committee or commission is a body of one or more persons subordinate to a deliberative assembly. A committee is not itself considered to be a form of assembly. Usually, the assembly sends matters into a committee as a way to explore them more ...
was formed to work out a practical tank design. The outcome was large tanks with a rhomboidal shape, to allow crossing of an trench: the Mark I tank, with the "male" versions mounting small naval guns and machine guns, and the "female" carrying only machine guns. In France, several competing arms industry organizations each proposed radically different designs. Smaller tanks became favored, leading to the Renault FT tank, in part by being able to leverage the engines and manufacturing techniques of commercial tractors and automobiles. Although the tanks' initial appearance on the battlefield in 1916 terrified some German troops, such engagements provided more opportunities for development than battle successes. Early tanks were unreliable, breaking down often. Germans learned they were vulnerable to direct hits from field artillery and heavy mortars, their trenches were widened and other obstacles devised to halt them, and special anti-tank rifles were rapidly developed. Also, both Britain and France found new tactics and training were required to make effective use of their tanks, such as larger coordinated formations of tanks and close support with infantry. Once tanks could be organized in the hundreds, as in the opening assault of the Battle of Cambrai in November 1917, they began to have notable impact. Throughout the remainder of the war, new tank designs often revealed flaws in battle, to be addressed in later designs, but reliability remained the primary weakness of tanks. In the Battle of Amiens, a major Entente counteroffensive near the end of the war, British forces went to field with 532 tanks; after several days, only a few were still in commission, with those that suffered mechanical difficulties outnumbering those disabled by enemy fire. Germany utilized many captured enemy tanks, and made a few of their own late in the war. In the last year of the war, despite rapidly increasing production (especially by France) and improving designs, tank technology struggled to make more than a modest impact on the war's overall progress.
Plan 1919 Plan 1919 was a military strategy drawn up by J.F.C. Fuller in 1918 during World War I. His plan criticised the practice of physically destroying the enemy, and instead called for tanks to rapidly advance into the enemy's rear area to destroy su ...
proposed the future use of massive tank formations in great offensives combined with ground attack aircraft. Even without achieving the decisive results hoped for during World War I, tank technology and mechanized warfare had been launched and would grow increasingly sophisticated in the years following the war. By
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
, the tank would evolve into a fearsome weapon critical to restoring mobility to land warfare.


At sea

The years leading up to the war saw the use of improved metallurgical and mechanical techniques to produce larger ships with larger guns and, in reaction, more armour. The launching of HMS Dreadnought (1906) revolutionized battleship construction, leaving many ships obsolete before they were completed. German ambitions brought an
Anglo-German naval arms race The arms race between Great Britain and Germany that occurred from the last decade of the nineteenth century until the advent of World War I in 1914 was one of the intertwined causes of that conflict. While based in a bilateral relationship t ...
in which the
Imperial German Navy The Imperial German Navy or the Imperial Navy () was the navy of the German Empire, which existed between 1871 and 1919. It grew out of the small Prussian Navy (from 1867 the North German Federal Navy), which was mainly for coast defence. Wilhel ...
was built up from a small force to the world's most modern and second most powerful. However, even this high-technology navy entered the war with a mix of newer ships and obsolete older ones. The advantage was in long-range gunnery, and naval battles took place at far greater distances than before. The 1916 Battle of Jutland demonstrated the excellence of German ships and crews, but also showed that the High Seas Fleet was not big enough to challenge openly the British
blockade of Germany The Blockade of Germany, or the Blockade of Europe, occurred from 1914 to 1919. The prolonged naval blockade was conducted by the Allies during and after World War I in an effort to restrict the maritime supply of goods to the Central Powers, w ...
. It was the only full-scale battle between fleets in the war. Having the largest surface fleet, the United Kingdom sought to press its advantage. British ships blockaded German ports, hunted down German and Austro-Hungarian ships wherever they might be on the high seas, and supported actions against German colonies. The German surface fleet was largely kept in the North Sea. This situation pushed Germany, in particular, to direct its resources to a new form of naval power: submarines.
Naval mine A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, an ...
s were deployed in hundreds of thousands, or far greater numbers than in previous wars. Submarines proved surprisingly effective for this purpose. Influence mines were a new development but moored contact mines were the most numerous. They resembled those of the late 19th century, improved so they less often exploded while being laid. The Allies produced enough mines to build the North Sea Mine Barrage to help bottle the Germans into the
North Sea The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian ...
, but it was too late to make much difference.


Submarines

World War I was the first conflict in which
submarine A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely op ...
s were a serious weapon of war. In the years shortly before the war, the relatively sophisticated propulsion system of diesel power while surfaced and battery power while submerged was introduced. Their armament had similarly improved, but few were in service. Germany had already increased production and quickly built up its
U-boat U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. Although at times they were efficient fleet weapons against enemy naval warships, they were most effectively used in an economic warfare ro ...
fleet, both for action against British warships and for a counterblockade of the British Isles. 360 were eventually built. The resulting U-boat Campaign (World War I) destroyed more enemy warships than the High Seas Fleet had, and hampered British war supplies as the more expensive surface fleet had not. The United Kingdom relied heavily on imports to feed its population and supply its war industry, and the German Navy hoped to blockade and starve Britain using
U-boats U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. Although at times they were efficient fleet weapons against enemy naval warships, they were most effectively used in an economic warfare rol ...
to attack merchant ships. Lieutenant Otto Weddigen remarked of the second submarine attack of the Great War: : Submarines soon came under persecution by submarine chasers and other small warships using hastily devised anti-submarine weapons. They could not impose an effective blockade while acting under the restrictions of the
prize rules In admiralty law prizes are equipment, vehicles, vessels, and cargo captured during armed conflict. The most common use of ''prize'' in this sense is the capture of an enemy ship and her cargo as a prize of war. In the past, the capturing force ...
and international law of the sea. They resorted to
unrestricted submarine warfare Unrestricted submarine warfare is a type of naval warfare in which submarines sink merchant ships such as freighters and tankers without warning, as opposed to attacks per prize rules (also known as "cruiser rules") that call for warships to s ...
, which cost Germany public sympathy in neutral countries and was a factor contributing to the American entry into World War I. This struggle between German submarines and British countermeasures became known as the "
First Battle of the Atlantic The Atlantic U-boat campaign of World War I (sometimes called the "First Battle of the Atlantic", in reference to the World War II campaign of that name) was the prolonged naval conflict between German submarines and the Allied navies in Atla ...
." As German submarines became more numerous and effective, the British sought ways to protect their merchant ships. "
Q-ship Q-ships, also known as Q-boats, decoy vessels, special service ships, or mystery ships, were heavily armed merchant ships with concealed weaponry, designed to lure submarines into making surface attacks. This gave Q-ships the chance to open f ...
s," attack vessels disguised as civilian ships, were one early strategy. Consolidating merchant ships into convoys protected by one or more armed navy vessels was adopted later in the war. There was initially a great deal of debate about this approach, out of fear that it would provide German U-boats with a wealth of convenient targets. Thanks to the development of active and passive
sonar Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (ranging), communicate with or detect objects on o ...
devices, coupled with increasingly deadly anti-submarine weapons, the convoy system reduced British losses to U-boats to a small fraction of their former level. Holland 602 type submarines and other Allied types were fewer, being unnecessary for the blockade of Germany.


Small arms

Infantry weapons Infantry is a military specialization which engages in ground combat on foot. Infantry generally consists of light infantry, mountain infantry, motorized infantry & mechanized infantry, airborne infantry, air assault infantry, and marine i ...
for major powers were mainly
bolt-action Bolt-action is a type of manual firearm action that is operated by ''directly'' manipulating the bolt via a bolt handle, which is most commonly placed on the right-hand side of the weapon (as most users are right-handed). Most bolt-actio ...
rifles, capable of firing ten or more rounds per minute. German soldiers carried Gewehr 98 rifle in 8mm mauser, the British carried the Short Magazine Lee–Enfield rifle, and the US military employed the
M1903 Springfield The M1903 Springfield, officially the United States Rifle, Caliber .30-06, Model 1903, is an American five-round magazine-fed, bolt-action service repeating rifle, used primarily during the first half of the 20th century. The M1903 was firs ...
and M1917 Enfield. Rifles with
telescopic sight A telescopic sight, commonly called a scope informally, is an optical sighting device based on a refracting telescope. It is equipped with some form of a referencing pattern – known as a '' reticle'' – mounted in a focally appropriate ...
s were used by snipers, and were first used by the Germans. Machine guns were also used by great powers; both sides used the
Maxim gun The Maxim gun is a recoil-operated machine gun invented in 1884 by Hiram Stevens Maxim. It was the first fully automatic machine gun in the world. The Maxim gun has been called "the weapon most associated with imperial conquest" by historian ...
, a fully automatic belt-fed weapon, capable of long-term sustained use provided it was supplied to adequate amounts of ammunition and cooling water, and its French counterpart, the Hotchkiss M1914 machine gun. Their use in defense, combined with barbed wire obstacles, converted the expected mobile battlefield to a static one. The machine gun was useful in stationary battle but could not move easily through a battlefield, and therefore forced soldiers to face enemy machine guns without machine guns of their own. Before the war, the French Army studied the question of a
light machine gun A light machine gun (LMG) is a light-weight machine gun designed to be operated by a single infantryman, with or without an assistant, as an infantry support weapon. LMGs firing cartridges of the same caliber as the other riflemen of the ...
but had made none for use. At the start of hostilities, France quickly turned an existing prototype (the "CS" for Chauchat and Sutter) into the lightweight Chauchat M1915 automatic rifle with a high rate of fire. Besides its use by the French, the first American units to arrive in France used it in 1917 and 1918. Hastily mass-manufactured under desperate wartime pressures, the weapon developed a reputation for unreliability. Seeing the potential of such a weapon, the British Army adopted the American-designed Lewis gun chambered in .303 British. The Lewis gun was the first true light machine gun that could in theory be operated by one man, though in practice the bulky ammo pans required an entire section of men to keep the gun operating. The Lewis Gun was also used for marching fire, notably by the Australian Corps in the July 1918
Battle of Hamel The Battle of Hamel was a successful attack by Australian Army and US Army infantry, supported by British tanks, against German positions in and around the town of Le Hamel, in northern France, during World War I. The attack was planned and ...
. To serve the same purpose, the German Army adopted the
MG08/15 The ''Maschinengewehr'' 08, or MG 08, was the German Army's standard machine gun in World War I and is an adaptation of Hiram S. Maxim's original 1884 Maxim gun. It was produced in a number of variants during the war. The MG 08 served during W ...
which was impractically heavy at counting the water for cooling and one belt of ammunition holding 100 rounds. In 1918 the
M1918 Browning Automatic Rifle The Browning Automatic Rifle (BAR) is a family of American automatic rifles and machine guns used by the United States and numerous other countries during the 20th century. The primary variant of the BAR series was the M1918, chambered for the ...
(BAR) was introduced in the US military, the weapon was an "automatic rifle" and like the Chauchat was designed with the concept of walking fire in mind. The tactic was to be employed under conditions of limited field of fire and poor visibility such as advancing through woods. Early submachine guns were much used near the end of the war, such as the MP-18. The US military deployed
combat shotgun A combat shotgun is a shotgun issued by militaries for warfare. The earliest shotguns specifically designed for combat were the trench guns or trench shotguns issued in World War I. While limited in range, the multiple projectiles typically ...
s, commonly known as ''trench guns''. American troops used Winchester Models 1897 and
1912 Events January * January 1 – The Republic of China is established. * January 5 – The Prague Conference (6th All-Russian Conference of the Russian Social Democratic Labour Party) opens. * January 6 ** German geophysicist Alfred ...
short-barreled pump action shotguns loaded with 6 rounds containing
antimony Antimony is a chemical element with the symbol Sb (from la, stibium) and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb2S3). Antimony compounds have been known since ancient ti ...
hardened 00 buckshot to clear enemy trenches. Pump actions can be fired rapidly, simply by working the slide when the trigger is held down, and when fighting within a trench, the shorter shotgun could be rapidly turned and fired in the opposite direction along the trench axis. The shotguns prompted a diplomatic protest from Germany, claiming the shotguns caused excessive injury, and that any U.S. combatants found in possession of them would be subject to execution. The U.S. rejected the claims, and threatened reprisals in kind if any of its troops were executed for possession of a shotgun.


Grenades

Grenades proved to be effective weapons in the trenches. When the war started, grenades were few and poor. Hand grenades were used and improved throughout the war. Contact fuzes became less common, replaced by time fuzes. The British entered the war with the long-handled impact detonating " Grenade, Hand No 1".Bull, Stephen (2002) ''World War 1 Trench Warfare; (1): 1914-16''. Oxford: Osprey Publishing; p. 27 This was replaced by the No. 15 "Ball Grenade" to partially overcome some of its inadequacies. An
improvised Improvisation is the activity of making or doing something not planned beforehand, using whatever can be found. Improvisation in the performing arts is a very spontaneous performance without specific or scripted preparation. The skills of impr ...
hand grenade was developed in Australia for use by ANZAC troops called the Double Cylinder "jam tin" which consisted of a tin filled with dynamite or guncotton, packed round with scrap metal or stones. To ignite, at the top of the tin there was a Bickford
safety fuse The safety fuse is a type of fuse invented and patented by English inventor William Bickford in 1831. Originally it consisted of a "tube" of gunpowder surrounded by a waterproofed varnished jute "rope." It replaced earlier and less reliable metho ...
connecting the detonator, which was lit by either the user, or a second person. The " Mills bomb" (Grenade, Hand No. 5) was introduced in 1915 and would serve in its basic form in the British Army until the 1970s. Its improved fusing system relied on the soldier removing a pin and while holding down a lever on the side of the grenade. When the grenade was thrown the safety lever would automatically release, igniting the grenade's internal fuse which would burn down until the grenade detonated. The French would use the F1 defensive grenade. The major grenades used in the beginning by the German Army were the impact-detonating " discus" or "oyster shell" bomb and the Mod 1913 black powder '' Kugelhandgranate'' with a friction-ignited time fuse. In 1915 Germany developed the much more effective ''
Stielhandgranate ''Stielhandgranate'' is the German term for " stick hand grenade" (translation: "shaft hand grenade") and generally refers to a prominent series of World War I and World War II-era German stick grenade designs, distinguished by their long ...
'', nicknamed "potato masher" for its shape, whose variants remained in use for decades; it used a timed fuse system similar to the Mills bomb. Hand grenades were not the only attempt at projectile explosives for infantry. A rifle grenade was brought into the trenches to attack the enemy from a greater distance. The Hales rifle grenade got little attention from the British Army before the war began but, during the war, Germany showed great interest in this weapon. The resulting casualties for the Allies caused Britain to search for a new defense. The Stokes mortar, a lightweight and very portable trench mortar with short tube and capable of
indirect fire Indirect fire is aiming and firing a projectile without relying on a direct line of sight between the gun and its target, as in the case of direct fire. Aiming is performed by calculating azimuth and inclination, and may include correcting aim ...
, was rapidly developed and widely imitated.Duffy, Michael (2000-07) "Safe Surf". http://www.firstworldwar.com/weaponry/mortars.htm Mechanical bomb throwers of lesser range were used in a similar fashion to fire upon the enemy from a safe distance within the trench. The Sauterelle was a grenade launching
Crossbow A crossbow is a ranged weapon using an Elasticity (physics), elastic launching device consisting of a Bow and arrow, bow-like assembly called a ''prod'', mounted horizontally on a main frame called a ''tiller'', which is hand-held in a similar ...
used before the Stokes mortar by French and British troops.


Flamethrowers

The Imperial German Army deployed flamethrowers () on the Western Front attempting to flush out French or British soldiers from their trenches. Introduced in 1915, it was used with greatest effect during the Hooge battle of the Western Front on 30 July 1915. The German Army had two main types of flame throwers during the Great War: a small single person version called the
Kleinflammenwerfer The first German man-portable flamethrower was called the ''Kleinflammenwerfer'' ('small flamethrower') or ''Kleif''. Fuel was stored in a large vertical, cylindrical backpack container. High-pressure propellant was stored in another, smaller con ...
and a larger crew served configuration called the
Grossflammenwerfer The ''Grossflammenwerfer'' or ''Grof'' is a large flamethrower, designed to be used from the trenches. In addition to man-portable units, the Germans designed heavy flamethrowers before and during the First World War. The fuel and propellant conta ...
. In the latter, one soldier carried the fuel tank while another aimed the nozzle. Both the large and smaller versions of the flame-thrower were of limited use because their short range left the exposed to small arms fire.


See also

* List of German weapons of World War I * Romanian military equipment of World War I


References


External links

* Johnson, Jeffrey
Science and Technology
, in

* ttp://www.europeanfilmgateway.eu/node/33/World%20War,%201914-1918%20Technology/multilingual:1/showOnly:video Historical film documents on technology during World War I at www.europeanfilmgateway.eu * Zabecki, David T.
Military Developments of World War I
, in

* Audoin-Rouzeau, Stéphane
Weapons
, in

* Pöhlmann, Markus
Close Combat Weapons
, in

* Watanabe, Nathan
Hand Grenade
, in

* Storz, Dieter
Rifles
, in

* Cornish, Paul
Flamethrower
, in

* Storz, Dieter
Artillery
, in

* Cornish, Paul
Machine Gun
, in

{{DEFAULTSORT:Technology During World War I Military equipment of World War I Science and technology during World War I 20th century in science 20th century in technology