long essay about world war 1

• Skip to main content
• Skip to secondary menu
• Skip to primary sidebar
• Skip to footer

A Plus Topper

Improve your Grades

World War 1 Essay | Essay on World War 1 for Students and Children in English

February 14, 2024 by Prasanna

World War 1 Essay: World War 1 was started in July 1914 and officially ended on November 11, 1918. Conflicts emerged among the most powerful forces in the modern world with the Austro-Hungarian Empire, Germany and the Ottoman Empire (and briefly Italy) on one side, and Britain, France, Russia, and later the United States on the other side during the war.

The war took the lives of some 20 million people and the world’s great empires fell. Czarist Russia turned into reinstated as the communist Soviet Union. Imperial Germany turned into reinstated as the Weimar Republic and lost some parts of its territory in the East and West.

You can also find more  Essay Writing  articles on events, persons, sports, technology and many more.

Long and Short Essays on World War 1 for Students and Kids in English

We are providing students with essay samples on a long essay of 500 words and a short of 150 words on the topic of World War 1 for reference.

Long Essay on World War 1 Essay 500 Words in English

Long Essay on World War 1 Essay is usually given to classes 7, 8, 9, and 10.

World War 1 started with a European conflict and gradually it developed into a World War. Militarism, nationalism, imperialism, and alliances increased the tensions among the European countries. The first reason, militarism, is known as the trend toward developing military resources, both for national defense and the protection of colonial interests.

Militarism indicated a rise in military disbursement and it extended to military and naval forces. It put more impact on the military men upon the policies of the civilian government. As a solution to problems militarism had a preference for force. This was one of the main reasons for the First World War. The second reason is there were too many alliances that frequently clashed with each other. Every country was pawning to safeguard others, creating intertwining mutual protection schemes.

They made alliances in secret, and they created a lot of mistrust and intuition among the European powers. Their general intuition stopped their diplomats to find a proper solution to many of the crises leading to war. Imperialism was the third reason for the First World War. As some areas of the world were left to colonize, nations were competing for subsisting colonies, and they were looking for enlarging their borders with adjacent countries. The fourth cause was nationalism. Nationalism is frequently insinuated to as identification with one’s own country and support for the country. Nationalism contains a strong recognition of a group of personnel with a political entity.

The support of individuals for their own country can become of one’s nation can become hatred of other nations. These were just some of the basic reasons for the war. Many people think that the instant reason for the war was because of the assassination of Archduke Francis Ferdinand, the successor to Austria-Hungary’s throne. Archduke Ferdinand was fired and murdered due to what was thought to be a political conspiracy. The Austro-Hungarian Empire suddenly doubted Serbian conspiracy in the assassination and looked to frame a response that would both punish Serbia, and make the world respect Austria-Hungary’s prestige and determination.

You can now access more Essay Writing on this topic and many more.

The Great War lasted four years. The war was finally over after four years and it took the lives of many people. On the eleventh hour of the eleventh day of the eleventh month of 1918, a cease-fire went into effect for all fighters. Though the war has been finished, the effects, are still seen perceptible in the world today.

In the aftermath of World War 1, the political, cultural, and social order of the world was drastically changed in many places, even outside the areas directly involved in the war. Old nations were removed, new nations were formed, international organizations set up, and many new and old ideas took a stronghold in people’s minds.

As Europe fell in debt from war investment, inflation beset the continent. In addition to this, the buoyancy of previous decades was relinquished and a discouraging, gloomy outlook on life was adopted after people had experienced the ferocity of warfare and the effects of the war were brutal.

Short Essay on World War 1 Essay 150 Words in English

Short Essay on World War 1 Essay is usually given to classes 1, 2, 3, 4, 5, and 6.

The War took the lives of approximately 20 million people and put a break in the economic development of several nations. The war happened between two parties consisting of more than one hundred nations. Though all of them did not send armed forces to the battlefield, they were a hoard of commodities and human resources and provided moral support to their companions. It continued for 4 long years from 1914 to 1918. Indian soldiers also took part in World War 1 as a colony of Britain from Africa and West Asia.

India had an aspiration that they might win independence. World War 1 war laid down the economy of the world. It led to food shortage, an outbreak of a pandemic, scarcity of vital items, etc. At the end of 1918, the war came to an end. The Allied Powers won the war. Both parties signed the Peace Treaty called an armistice.

10 Lines on World War 1 Essay in English

1. The First World War was instigated in 1914 by Serbia. 2. The cause of the war was a competition between countries to acquire weapons and build military powers. 3. In 1914, Serbia aroused anger by assassinating Archduke Franz Ferdinand, the heir of Austria-Hungary throne. 4. The Allied Powers, and the Central Powers fought against each other. 5. The Central Powers include countries, such as Germany, Bulgaria, Austria-Hungary, Ottoman Empire, and Turkey. 6. The Allied Powers consisted of Serbia, Russia, The United Kingdom, France, Italy, Japan, and Belgium. 7. India, as a British colony, supported Britain. 8. The German adopted a militaristic Schlieffen approach. 9. World War 1 was fought from trenches, so it is also called the Trench War. 10. The War ended in 1918 after both allies signed an armistice.

FAQ’s on World War 1 Essay

Question 1. List the names of the two allies of the First World War 1914-1918.

Answer: The Allied Powers and the Central Powers.

Question 2. Who declared the First World War?

Answer: Austria-Hungary.

Question 3. Name the countries of Allied Powers.

Answer: Britain, Japan, France, Italy, Russia, the USA.

Question 4.  Why did the First World War end?

Answer: The First World War ended in November 1918 when both allies signed the Peace Treaty known as an armistice.

• Picture Dictionary
• English Speech
• English Slogans
• English Letter Writing
• English Essay Writing
• English Textbook Answers
• Types of Certificates
• ICSE Solutions
• Selina ICSE Solutions
• ML Aggarwal Solutions
• HSSLive Plus One
• HSSLive Plus Two
• Kerala SSLC
• Distance Education

• History Classics
• Your Profile
• Find History on Facebook (Opens in a new window)
• Find History on Twitter (Opens in a new window)
• Find History on YouTube (Opens in a new window)
• Find History on Instagram (Opens in a new window)
• Find History on TikTok (Opens in a new window)
• This Day In History
• History Podcasts
• History Vault

World War I

World War I pitted Germany, Austria-Hungary and the Ottoman Empire against Great Britain, the United States, France, Russia, Italy and Japan. New military technology resulted in unprecedented carnage. By the time the war was over and the Allied Powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

World War I Battles: Timeline

For four years, from 1914 to 1918, World War I raged across Europe’s western and eastern fronts after growing tensions and then the assassination of Archduke Franz Ferdinand of Austria ignited the war. Trench warfare and the early use of tanks, submarines and airplanes meant the war’s battles were devastatingly bloody, claiming an estimated 40 […]

Outbreak of World War I

Europe by 1914 Almost exactly a century before, a meeting of the European states at the Congress of Vienna had established an international order and balance of power that lasted for almost a century. By 1914, however, a multitude of forces was threatening to tear it apart. The Balkan Peninsula, in southeastern Europe, was a […]

Prelude to Lusitania: Germany Announces Unrestricted Submarine Warfare When World War I erupted in 1914, President Woodrow Wilson (1856‑1924) pledged neutrality for the United States, a position that the vast majority of Americans favored. Britain, however, was one of America’s closest trading partners, and tension soon arose between the United States and Germany over the […]

Battle of the Somme

Battle Begins – July 1, 1916 Prior to the attack, the Allies launched a week‑long heavy artillery bombardment, using some 1.75 million shells, which aimed to cut the barbed wire guarding German’s trench defenses and destroy the enemy’s positions. On the morning of July 1, 11 divisions of the British 4th Army—many of them volunteer […]

World War I Alliances

In the years leading up to WWI, a series of agreements between the powers of Europe helped determine where and when battlelines were drawn.

The Harlem Hellfighters

The Harlem Hellfighters were an African‑American infantry unit in WWI who spent more time in combat than any other American unit. Despite their courage, sacrifice and dedication to their country, they returned home to face racism and segregation from their fellow countrymen.

Deconstructing History: U‑Boats

These deadly German submarines dominated the waters in both WWI and WWII.

The One Thing You Should Know About WWI

The story of World War I is vast and intricate, but if you had to know just one thing about World War I, what would it be?

How Imperialism Set the Stage for World War I

Many of the powers in World War I were competitive in overtaking territories in Europe and Africa.

How Airplanes Were Used in World War I

Even though airplanes were a relatively new invention, the race for air superiority started during World War I.

How a Regional Conflict Snowballed Into World War I

When Austria‑Hungary declared war on Serbia in 1914, each of their allies quickly joined the fight.

11 Objects Carried by World War I Infantrymen

Here are some of the essential items that typical American infantrymen carried with them on the battlefields of World War I.

This Day in History

Benito Mussolini declares himself dictator of Italy

This Day in History Video: What Happened on January 18

This Day in History Video: What Happened on December 25

This Day in History Video: What Happened on November 11

Battle of the somme begins, john maynard keynes predicts economic chaos from the treaty of versailles.

The Causes and Effects of World War I Essay

• To find inspiration for your paper and overcome writer’s block
• As a source of information (ensure proper referencing)
• As a template for you assignment

Introduction

The effects of World War I can be seen around the world even now, more than one hundred years after its end; however, there is still no consensus as to its cause. In the words of Alfred Korzybski, “the destruction was brought about by nationalism, entangled alliances, narrow ethnic concerns, and desires for political gain – forces that are still with people today.” (cited in Levinson, 2014). Even though the majority of United States citizens did not have the direct experience of the terrific upset that the war caused in Europe, it can be argued that the country’s concern with championing democracy around the globe is one of its products (Levinson, 2014).

Many historians agree that an atmosphere of twentieth-century Europe was conducive to the creation of a complex mixture of economic, social, and political reasons that translated into powerful forces of imperialistic, nationalistic, and militaristic movements leading to the diplomatic crises of 1914 (Donaldson, 2014). Therefore, it can be said that the blame for the war could not be assigned to any individual country or a group of countries.

Nonetheless, the issue of responsibility was the main focus of the world in the years following the Armistice of 1918 (Donaldson, 2014). To this end, the Commission on the Responsibility of the Authors of the War and the Enforcement of Penalties met in Paris in 1919 (Donaldson, 2014). The investigation conducted by the commission showed that Germany and Austria, along with Turkey and Bulgaria as their allies, were responsible for the aggressive foreign policy tactics that led to the precipitation of the war (Donaldson, 2014).

The start of World War I was precipitated by the assassination of the heir to the Austro-Hungarian throne, Archduke Franz Ferdinand, on June 28, 1914 (Mulligan, 2010) The elimination of the high-standing official was carried out by the group of secret society members called Black Hand and directed by Bosnian Serb Danilo Ilić (Storey, 2009). The political objective of the murder was to separate Austria-Hungary’s South Slav provinces to combine them into Yugoslavia (Storey, 2009).

In response to the killing of their official, Austria-Hungary issued an ultimatum to Serbia that commanded its government to prosecute the assassins. The objective of the ultimatum was to make its terms so strict that Serbia would be forced to reject it, thereby giving an excuse for launching a small war against it (Storey, 2009). Taking into consideration that Serbia had diplomatic relationships with Russia strengthened by their shared Slavic ties, the Austro-Hungarian government decided to take precautions against the two countries declaring war on it and allied with Germany. It is agreed that Germany was not opposed to Austro-Hungarian bellicosity, but rather supported and encouraged it, thus providing one more reason for the precipitation of the Great War (Levinson, 2014).

Even though Serbia’s response to the ultimatum was placating, Austria-Hungary decided to take aggressive action and declare war. It is argued that the main reason for World War I was the web of entangling alliances among the countries having an interest in the conflict between Austro-Hungary and Serbia (Storey, 2009). Following the Austro-Hungarian declaration of war, the Russian monarch mobilized his army because of the binding commitment of the treaty signed by the two countries.

As a result, on August 3, 1914, Germany declared war on the Russian Empire (Levinson, 2014). France was bound by treaty to Russia, and, therefore, had to start a war on Austria-Hungary and Germany. Even though a treaty tying France and Britain was loosely worded, the latter country had “a moral obligation” to defend the former (Levinson, 2014). Therefore, Britain and its allies Australia, Canada, India, New Zealand, Japan, and the Union of South Africa also took a bellicose stance against Germany and offered their assistance in the military action against the country (Levinson, 2014). Thus, a gigantic web of entangling alliances pushed numerous countries to the precipice of war over what was intended to be a small-scale conflict between Austria-Hungary and Serbia.

Numerous other reasons led to World War I. The conflicting political interests of Russia and Japan over Manchuria and Korea resulted in a military defeat of Russia (Levinson, 2014). Therefore, the country wanted to restore its dignity by a victorious war. During the same period, a lot of small nations were seething with discontent over the Turkish and Austro-Hungarian rule, thereby providing an opportunity for the Russian Empire further to stir resentment by firing up nationalistic zeal under a pretense of pan-Slavic narrative (Levinson, 2014).

Austria-Hungary, on the other hand, sought an opportunity to establish its influence over a vast territory of mixed nations; the assassination of the heir to the Austro-Hungarian throne provided them with a perfect excuse for the initiation of the war. Political clashes in Germany were a reason for the country’s government to resort to the military conflict as a way of “averting civil unrest” (Levinson, 2014). Another factor that caused World War I was the desire of France to revenge a military defeat in the Franco-Prussian War of 1871 (Levinson, 2014).

It is impossible to name a single reason for the initiation of World War I. However, it is clear that the entangling web of alliances among numerous parties participating in the war, as well as complicated plots of governments and empires, led the small-scale dispute between Austria-Hungary and Serbia escalating into a military conflict that swept the entire world.

Donaldson, P. (2014). Interpreting the origins of the First World War. Teaching History , 155 (4), 32-33.

Levinson, M. (2014). Ten cautionary GS lessons from World War I. Et Cetera, 71 (1), 41-48.

Mulligan, W. (2010). The origins of the First World War . Cambridge, England: Cambridge University Press.

Storey, W. (2009). The First World War . Lanham, MD: Rowman & Littlefield Publishers.

• First World War: German and Austrian Policies' Response
• World War I and the 1920s
• The Late 19th Century and the First World War, 1850-1918
• Eastern Crisis of 1875-1878
• Outbreak of War in Europe in 1914
• World War I, Its Origin and Allies
• The Worst Team in History: the Gallipoli Failure
• Principal Causes of the First World War
• "Two Cheers for Versailles" by Mark Mazower
• Germany's Aims in the First World War
• Chicago (A-D)
• Chicago (N-B)

IvyPanda. (2020, October 9). The Causes and Effects of World War I. https://ivypanda.com/essays/the-causes-and-effects-of-world-war-i/

"The Causes and Effects of World War I." IvyPanda , 9 Oct. 2020, ivypanda.com/essays/the-causes-and-effects-of-world-war-i/.

IvyPanda . (2020) 'The Causes and Effects of World War I'. 9 October.

IvyPanda . 2020. "The Causes and Effects of World War I." October 9, 2020. https://ivypanda.com/essays/the-causes-and-effects-of-world-war-i/.

1. IvyPanda . "The Causes and Effects of World War I." October 9, 2020. https://ivypanda.com/essays/the-causes-and-effects-of-world-war-i/.

Bibliography

IvyPanda . "The Causes and Effects of World War I." October 9, 2020. https://ivypanda.com/essays/the-causes-and-effects-of-world-war-i/.

• History & Society
• Science & Tech
• Biographies
• Animals & Nature
• Geography & Travel
• Arts & Culture
• Games & Quizzes
• On This Day
• One Good Fact
• New Articles
• Lifestyles & Social Issues
• Philosophy & Religion
• Politics, Law & Government
• World History
• Health & Medicine
• Browse Biographies
• Birds, Reptiles & Other Vertebrates
• Bugs, Mollusks & Other Invertebrates
• Environment
• Fossils & Geologic Time
• Entertainment & Pop Culture
• Sports & Recreation
• Visual Arts
• Demystified
• Image Galleries
• Infographics
• Top Questions
• Britannica Kids
• Saving Earth
• Space Next 50
• Student Center

World War I 1914-1918

• Special Features

• Marie Curie
• Women’s International League for Peace and Freedom
• women’s suffrage

• trench warfare
• Christmas Truce
• chemical weapon

• Harlem Hellfighters
• James Reese Europe
• Noble Sissle

• military aircraft
• machine gun

The most comprehensive and authoritative history site on the Internet.

World War I: ‘The War to End All Wars’

World war i facts.

The war fought between July 28, 1914, and November 11, 1918, was known at the time as the Great War, the War to End War, and (in the United States) the European War. Only when the world went to war again in the 1930s and ’40s did the earlier conflict become known as the First World War.

Its casualty totals were unprecedented, soaring into the millions. World War I is known for the extensive system of trenches from which men of both sides fought. Lethal new technologies were unleashed, and for the first time a major war was fought not only on land and on sea but below the sea and in the skies as well. The two sides were known as the Allies or Entente — consisting primarily of France, Great Britain, Italy, Russia, and later the United States — and the Central Powers, primarily comprised of Austria-Hungary (the Habsburg Empire), Germany, and the Ottoman Empire (Turkey). A number of smaller nations aligned themselves with one side or the other. In the Pacific Japan, seeing a chance to seize German colonies, threw in with the Allies. The Allies were the victors, as the entry of the United States into the war in 1917 added an additional weight of men and materiel the Central Powers could not hope to match.

WHEN DID WORLD WAR I START?

July 28, 1914

When Did World War I End?

November 11, 1918

WHERE DID WORLD WAR I TAKE PLACE?

Europe, Mediterranean, and Northern Africa

Who Won World War I?

The Allied powers, namely France, Great Britain, and the United States.

ALLIED Leaders

• Nicholas II, Czar of Russia
• Aristide Briand, Prime Minister of France (1915-1917)
• Georges Clemenceau, Prime Minister of France and Minister of War (1917–1920)
• H. H. Asquith, Prime Minister of the United Kingdom (1908–1916), Secretary of State for War (1914)
• David Lloyd George, Prime Minister of the United Kingdom (1916–1922), Secretary of State for War (1916)
• Woodrow Wilson, President of the United States

Central Power Leaders

• Franz Joseph I, Emperor of Austria (1848-1916)
• Karl I, Emperor of Austria (1916-1918)
• Wilhelm II, German Emperor
• Mehmed V, Sultan of the Ottoman Empire (1909-1918)

Related Stories & Content

Book Review: Showing A New Side to Rommel At War

How Erwin Rommel Has Been Lost in Translation

Mercy Dogs: Meet the Heroes Who Delivered Aid and Comforted the Dying on the Battlefields of World War I

An Inside Look At 100 Years of Honoring America’s War Dead

World war i summary: .

The war resulted in a dramatically changed geopolitical landscape, including the destruction of three empires: Austro-Hungarian, Ottoman and Russian. New borders were drawn at its conclusion and resentments, especially on the part of Germany, left festering in Europe. Ironically, decisions made after the fighting ceased led the War to End War to be a significant cause of the Second World War.

As John Keegan wrote in  The First World War  (Alfred A. Knopf, 1999), “The First World War was a tragic and unnecessary conflict … the train of events that led to its outbreak might have been broken at any point during the five weeks of crisis that preceded the first clash of arms, had prudence or common goodwill found a voice.”

CASUALTIES IN WORLD WAR I

In terms of sheer numbers of lives lost or disrupted, the Great War was the most destructive war in history until it was overshadowed by its offspring, the Second World War: an estimated 10 million military deaths from all causes, plus 20 million more crippled or severely wounded. Estimates of civilian casualties are harder to make; they died from shells, bombs, disease, hunger, and accidents such as explosions in munitions factories; in some cases, they were executed as spies or as “object lessons.” Additionally, as Neil M. Heyman in  World War I  (Greenwood Press, 1997) wrote, “Not physically hurt but scarred nonetheless were 5 million widowed women, 9 million orphaned children, and 10 million individuals torn from their homes to become refugees.” None of this takes into account the deaths in the Russian Civil War or the Third Balkan War, both of which directly resulted from World War I, nor the Spanish influenza pandemic of 1918 that killed 50 million people worldwide, which was spread in part by conditions at the front and by soldiers returning home.

The highest national military casualty totals—killed, wounded, and missing/taken prisoner—in round numbers (sources disagree on casualty totals), were:

• Russia: 9,150,000
• Germany: 7,143,000
• Austria-Hungary: 7,000,000
• France, 6,161,000
• Britain & Commonwealth: 3,190,000
• Italy: 2,197,000
• Turkey (Ottoman Empire): 975,000
• Romania: 536,000
• Serbia: 331,000
• USA: 323,000
• Bulgaria: 267,000

For more information, click to see the  Casualties of World War I .

What Started World War I?

Prime Minister of Germany Otto von Bismarck had prophesied that when war again came to Europe it would be over “some damn foolish thing in the Balkans.” Indeed, the assassination of Archduke Franz Ferdinand, heir apparent to the Habsburg throne of Austria-Hungary, and his wife, Sophie, by a Serbian nationalist on June 28, 1914, was the match that lit the fuse—but it didn’t create the powder keg. The outbreak of war between European nations was the result of several factors:

• Concern over other countries’ military expansion, leading to an arms race and entangling alliances
• Fear of losing economic and/or diplomatic status
• Long-standing ethnic differences and rising nationalism in the Balkans
• French resentment of territorial losses in the 1871 Franco-Prussian War
• The influence exerted by military leaders

Following their 1871 victory in the Franco-Prussian War, the German states unified into a single nation. Its leader, Kaiser Wilhelm II, eldest grandson of Britain’s Queen Victoria, envisioned an Imperial Navy that could rival Great Britain’s large and renowned fleet. This would increase German influence in the world and likely allow the country to expand its colonial holdings. Britain, fearful of losing its dominance of the seas, accelerated its naval design and construction to stay ahead of the Kaiser’s ship-building program.

Russia was rebuilding and modernizing its large army and had begun a program of industrialization. Germany and Austria-Hungary saw the threat posed by Russia’s large population and, hence, its ability to raise a massive army. They formed an alliance for self-protection against the Russian bear.

France, still stinging over the loss of Alsace and part of Lorraine in the Franco-Prussian war, made an agreement allying itself with Russia in any war with Germany or Austria-Hungary. Britain, after finding itself friendless during the Second Boer War in South Africa (1899–1902) allied itself with France and worked to improve relations with the United States of America. Russia, with many ethnic groups inside its vast expanse, made an alliance with Serbia in the Balkans.

The old Ottoman Empire was crumbling; “The Sick Man of Europe” was the phrase used to describe the once-powerful state. As its ability to exert control over its holdings in the Balkans weakened, ethnic and regional groups broke away and formed new states. Rising nationalism led to the First and Second Balkan Wars, 1912 and 1913. As a result of those wars, Serbia increased its size and began pushing for a union of all South Slavic peoples. Serbian nationalism led 19-year-old Gavrilo Princip to assassinate Archduke Franz Ferdinand, heir apparent to the Habsburg throne of Austria-Hungary, and his wife, Sophie. Austria-Hungary, urged on by Germany, sent a list of demands to Serbia in response; the demands were such that Serbia was certain to reject them. When it did, the Habsburg Empire declared war on Serbia on July 28, exactly one month after the archduke’s assassination. Russia came in on the side of the Serbs, Germany on the side of the Habsburgs, and the entangling alliances between the nations of Europe pulled one after another into the war. Although diplomats throughout Europe strove to settle matters without warfare right up to the time the shooting started, the influence military leaders enjoyed in many nations won out—along with desires to capture new lands or reclaim old ones.

COMBAT IN THE FIRST WORLD WAR

German military planners were ready when the declarations of war began flying across Europe. They intended to hold off the Russians in the east, swiftly knock France out of the war through a maneuver known as the Schliefffen Plan, then throw their full force, along with Austria-Hungary, against the Russians. The Schliefffen Plan, named for General Count Alfred von Schlieffen who created it in 1905, called for invading the Low Countries (Luxembourg and Belgium) in order to bypass to the north the strong fortifications along the French border. After a rapid conquest of the Low Countries, the German advance would continue into northern France, swing around Paris to the west and capture the French capital. It almost worked, but German commander in chief General Helmuth von Moltke decided to send his forces east of Paris to engage and defeat the weakened French army head-on. In doing so he exposed his right flank to counterattack by the French and a British Expeditionary Force, resulting in the First Battle of the Marne, September 6–10, 1914. Despite casualties in the hundreds of thousands, the battle was a stalemate, but it stopped the German drive on Paris. Both sides began digging a network of trenches. The First Battle of the Marne was a window onto how the rest of the war would be fought: extensive trenchworks against which large numbers of men would be hurled, suffering extremely high casualties for little if any territorial gains. The centuries-old method of massed charges to break through enemy positions did not work when the men faced machine guns, barbed wire, and drastically more effective artillery than in the past.

The next four years would see battles in which millions of artillery shells were fired and millions of men were killed or mutilated. Click here to read about some of the  costliest battles of the First World War . Deadly new weapons were responsible for the unprecedented carnage.

NEW WEAPONS OF WORLD WAR I

Among the lethal technological developments that were used for the first time (or in some cases used for the first time in a major conflict) during the Great War were the machine gun, poison gas, flamethrowers, tanks and aircraft. Artillery increased dramatically in size, range and killing power compared to its 19th-century counterparts. In the war at sea, submarines could strike unseen from beneath the waves, using torpedoes to send combat and merchant ships to the bottom. Click here for more information on  Weapons of World War I .

WAR ON THE EASTERN FRONT

On the Eastern Front, the German general Paul von Hindenburg and his chief of staff Erich Ludendorff engineered strategies that gave them dramatic victories over Russian armies. The war became increasing unpopular among the Russian people. Ludendorff, sensing a chance to take Tsar Nicholas II’s country out of the war, arranged for an exiled Marxist revolutionary named Vladimir Lenin to cross Europe in a special train and get back into Russia. As hoped, Lenin helped fuel the rising revolutionary fervor. The tsar was deposed and executed with his family in the March 1917 revolution. For the first time in Russian history a republican democracy was established, but its leaders underestimated the people’s resistance to continuing the war. When the new government failed to bring about a rapid peace, it was overthrown in November by a socialist revolution led by Lenin, following which Russia signed a peace agreement with Germany.

WAR IN THE MOUNTAINS

Fighting in the high elevations of the Balkans and Alps created additional agony for soldiers fighting there: bitterly cold winters and especially rugged terrain.

Serbia, whose countryman had fired the shots that gave rise to the slaughter taking place in Europe, was invaded twice by Austria-Hungary but repulsed both attempts. In the autumn of 1915, a third invasion came. This time the Hapsburgs were joined by Germany and Bulgaria. The outnumbered Serbs gave ground. Ultimately, the Serbian Army only escaped annihilation by a demanding march through Albania to the Adriatic Sea, where the French Navy rescued the survivors.

Romania remained neutral until August 1916 when it joined the Allies and declared war on Austria-Hungary in hopes of securing additional territories including Transylvania. As the poorly trained Romanian army advanced into Transylvania, German forces invaded and occupied Romania itself, quickly knocking the country out of the war.

Italy, wooed by both sides, entered the war on the Allied side in May 1915. Its efforts were concentrated on breaking through Austria’s mountain defenses, but its poorly equipped soldiers were ground up in a series of attacks at the Isonzo River, though their opponents also suffered severely. What gains the Italians made in the war were wiped out by a rout that began at Caporeto in October 1917 and unhinged the entire line.

THE WAR SPREADS BEYOND EUROPE

While soldiers in Europe lived and died in the muddy, disease-ridden trenches, Britain attempted an attack in February 1915 against the Ottoman Empire, the “soft underbelly” of Europe, to aid the Russians and, ideally, force Turkey out of the war. An attempted invasion on the Gallipoli Peninsula resulted in a bloody repulse, but war in the interior of the Ottoman Empire met with greater success. Arab groups seeking to overthrow the empire waged a successful guerrilla war in the Mideast, led by Prince Feisal, third son of the Grand Sharif of Mecca. The revolt was aided by British liaison officer T.E. Lawrence of Wales, who became known as Lawrence of Arabia.

When the war ended, the Ottoman Empire was broken up. England and France drew borders for new countries in the Mideast without regard for ethnic and religious factions. The centuries-old tensions between the native inhabitants of the region led to many of the problems causing turmoil in the Mideast today, another irony of the War to End War.

Africa was home to a sideshow of the European fighting. European nationals and colonial troops of both sides fought against each other, but the German colonies were widely separated and unable to support each other. In German East Africa (Tanzania) an aggressive general named Paul von Lettow-Vorbeck waged a guerilla campaign against his British opponents until after the armistice was signed in Europe that ended the Great War.

In the waters of the Pacific Ocean German commerce raiders found prey among merchant vessels of Allied nations. Japan joined the Allies war effort on August 23, 1914, ostensibly in fulfillment of the Anglo-Japanese Treaty of 1911. The Land of the Rising Sun seized German colonies such as the Marianas, Marshalls and Carolines island chains that would see intense fighting during the Second World War.

Among the causes of the First World War was the naval arms race that began with Britain’s deployment of HMS  Dreadnought , a new design that eschewed small, secondary arms in favor of big guns heavily armored for protection. Every nation wanted a Dreadnought, and Germany sought to increase the size of its fleet to the level of Britain’s. Accomplishing that goal while supporting large armies engaged in warfare proved impossible for Germany, but World War I saw the last great battles fought entirely between surface ships. Notable naval engagements include the Falkland Islands and Coronel off South America, and the battles of Heligoland Bight, Dogger Bank and Jutland in the North Sea. Jutland would prove to be not only the largest naval battle up to that time but the last in which fighting would take place only between surface ships. In World War II, the aircraft carrier became the most lethal surface ship and allowed enemy fleets to engage in battle without ever seeing each other from a captain’s bridge.

The most significant advance in naval warfare to come out of the Great War was the development of submarines, which the German Imperial Navy called  Unterseeboots  (undersea boats). That got shortened to U-boats, a name that became synonymous with submarine. Subs could hide beneath the waves in shipping lanes to attack merchant or combat ships with torpedoes without ever being seen. Such attacks on merchant or passenger ships without giving the crews and passengers warning so they could escape in lifeboats was considered a violation of the laws of naval warfare, and became known as “unrestricted” submarine warfare. Germany engaged in such unrestricted warfare until  U-20  sunk the British passenger liner  Lusitania  off Ireland in May 1915. Over 1,200 lives were lost, including 128 Americans, and the US threatened to break diplomatic relations with Germany. The Imperial Navy subsequently instituted strict regulations for U-boat attacks, but those went by the boards in 1917 as the Germans tried to cut off supplies to Britain and starve the island nation into submission. It was a bad decision. The renewal of unrestricted submarine warfare and subsequent sinking of three American ships brought the US into the war, after which Germany’s fate was all but sealed.

WAR IN THE AIR

Airplanes had already seen limited military before World War I began. Italian aircraft were used for reconnaissance and small-scale bombing during the Italo-Turkish War of 1911. Aircraft during World War I continued to be used primarily for reconnaissance, including photo-reconnaissance missions. The first aircraft of the war weren’t even armed, since no serious effort had been made to create a fighting flying machine. Pilots began shooting at each other with pistols and rifles. Soon various schemes were attempted to attach machine guns to planes. The breakthrough came in 1915 when Holland’s Anthony Fokker developed a method to synchronize a machine gun’s fire with the rotation of the propeller on his  Eindecker  (single-wing) design for the German air force.

Early war planes were very light and used small engines with top speeds of less than 100 mph. On many designs the engine was in the rear and pushed the plane through the air. The demands of wartime, each side trying to outdo the other’s technological advances, created rapid improvements in aircraft design. Changes might occur within weeks; in the decades following the war, such changes would take years. By war’s end small, single-engine planes had been joined by multi-engine bombers such as the Giant, which Germany used to bomb British cities. Zeppelins were also used for reconnaissance and for bombing over land and sea. Tethered barrage balloons carried observers high above the front to watch enemy troop movements—and attracted the attention of the enemy’s airborne fighters.

While the war on the ground was a miserable existence in muddy, rat- and disease-infested trenches, and millions of lives might be spent to gain a few miles of territory, the war in the air captured the imagination of the world. Using this exciting new technology to maneuver through the skies and engage the enemy in one-on-one dogfights in which skillful pilots could rise to the status of ace gave the air war a sense of glamour that still hangs over the pilots of World War I.

AMERICA JOINS THE WAR

Most Americans saw little reason for the United States to involve itself in “the European War,” though some individuals—such as young pilots excited at the notion of flying in combat—enlisted through Canada or elsewhere. President Woodrow Wilson won reelection in 1916 on the slogan, “He kept us out of war.” That same year he tried to bring the combatant nations to the bargaining table to seek an end to the war that would be fair to all, but the attempt failed.

America was drawn into the conflict by the Zimmerman telegraph and unrestricted submarine warfare. On January 16, 1917, Foreign Secretary of the German Empire Arthur Zimmerman sent a coded message to the German ambassador in Mexico City, Heinrich von Eckart informing him Germany would return to unrestricted submarine warfare on February 1, a policy that might cause America to declare war. “We shall endeavor in spite of this to keep the United States of America neutral,” Zimmerman wrote, but if those efforts failed, Eckart was to convince Mexico to become Germany’s ally. As an inducement, Eckart was authorized to offer the return of the US states of Texas, New Mexico and Arizona to Mexico after America was defeated.

The code was broken, and the contents of the telegram published on March 1. Americans were outraged. Two weeks later German U-boats sank three American vessels. Wilson asked Congress on April 1 to authorize a declaration of war against Germany, which it did four days later. War was declared on the other Central Powers shortly thereafter.

When American troops and war materiel began arriving in Europe later in 1917, it unalterably shifted the balance of power in favor of the Allies. A final German offensive began on May 21, 1918, an attempt to win the war before the full weight of American strength could arrive. The Spring Offensive (also called the Ludendorff Offensive and the Kaiser’s Battle) sputtered out when German supply vehicles couldn’t keep up with the rapidly advancing soldiers across the broken, cratered battleground, and the Kaiser’s troops were left in poor defensive positions. An Allied operation that became known as the Hundred Days Offensive pushed the enemy back to the German border by September. Germany’s allies began their own peace negotiations.

The German navy mutinied. Ludendorff, architect of many German victories in the east, was dismissed. Riots broke out, often led by German Bolsheviks. Prince Max, Chancellor of Germany, authorized negotiations for peace terms and stipulated that both military and civilian representatives be involved. He then turned his title over to Friedrich Ebert, leader of the Socialist Democratic movement. Kaiser Wilhelm II abdicated on November 9. An agreement between the combatants called for all guns to fall silent on the 11th hour of the 11th day of the 11th month. Yet, even on the morning of November 11, before the designated time for the armistice to begin, some field officers ordered their men to make attacks, which accomplished little except more bloodshed.

THE ARMISTICE

A series of peace treaties were signed between the combatant nations, but the most significant was the Treaty of Versailles, signed on July 28, 1919, five years after Austria-Hungary had declared war on Serbia. Germany had hoped Woodrow Wilson would be a moderating factor that would allow for more generous peace terms, but the nations that had lost millions of young men to the weapons of the Central Powers were in no mood to be forgiving. As a result of the various treaties, the Ottoman Empire was dismantled. Austria-Hungary was broken into separate nations and forced to cede lands to successor states such as Czechoslovakia. Bulgaria was limited to a 20,000-man army, denied any aircraft or submarines and ordered to pay reparations over a 35-year period. Germany was restricted to a standing army of just 100,000 men, denied possession of certain weapons such as tanks, forced to pay reparations to its former enemies and give up all of its overseas colonies as well as some of its territories in Europe. In the coming years Germans would brood over the harsh terms and seek not only to overturn them but to inflict punishment on the nations that demanded them.

All combatant nations had concealed from their people the true extent of casualties during the war, but in Germany, where Hindenburg and Ludendorff were given control over virtually all aspects of civilian life as well as over the military, any negative reports about what was happening at the front were considered “defeatist” and were prohibited. Accordingly, much of the population believed it when they were told Germany was winning the war. The country’s sudden capitulation left them shocked and bewildered. Hindenburg claimed that the German soldier had been winning the war but was “stabbed in the back” by civilians who overthrew the monarchy. The popular old soldier was elected president of Germany, and his “stabbed in the back” myth was used to great effect by a rising political star, Adolf Hitler.