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On July 28th 1914 began the outbreak of the First World War, aka World War 1 or The Great War for Civilisation. Join us as we learn everything there is to know in our World War 1 facts ...

World War 1 facts: Why did it start?

A hundred years might seem like a very long time ago, but it isn't really. Your great-great grandparents were around then, and they would have lived through, and maybe even taken part in, this terrible conflict.

Lots of history books have been written on World War 1 facts and why it started. But it all boils down to the fact that Europe had split into two large families of countries. The Allies - the British Empire, France, Belgium, Russia and later, the USA - were in one family. And the Central Powers of Germany, Austria, Hungary, Bulgaria and Turkey were in the other. On 4 August 1914, Germany invaded Belgium, and so, standing by its promise to stick up for Belgium, Britain declared war on Germany. The world was at war...

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How long did World War 1 last?

When the First World War began that summer, most people thought it would be over by Christmas. Many believed that Britain was so powerful it could win very quickly. In fact, the First World War lasted four terrible years, not four months.

Life in the trenches in World War 1

By the winter of 1915, the opposing sides had both dug long ditches called trenches which faced each other, in some places just 30m apart! These lines of narrow trenches stretched from the Belgian coast to Switzerland, and were known as the Western Front. Over five million British soldiers spent time living in these muddy, miserable ditches, taking it in turns to be on the Front Line - the trench closest to the enemy.

Did you know that we have a FREE downloadable First World War primary resource? Great for teachers, homeschoolers and parents alike!

Day-to-day life there was smelly and grim. There were millions of giant rats, overflowing latrines (loos) and terrible lice infestations. Not to mention the dead bodies. Every so often, soldiers on the Front Line would be instructed to leave their trench and venture into dangerous No Man's Land (the area between the sides) to try to push back the enemy.

A new type of war

This war was very different from conflicts of the past. For the first time, powerful new weapons and vehicles were used - at sea, on land and in the air - resulting in many people being killed or wounded. In Britain, you could sometimes hear what sounded like thunder coming across the English Channel from Europe. In fact, it was the huge boom of big guns, called artillery, being fired on the Western Front. 75% of all men who died in World War 1 were killed by artillery.

The largest battle of the World War 1 - the Battle of the Somme - is known as one of the bloodiest battles in history. It was fought by the French and British against the Germans on both sides of the River Somme in France, and lasted for more than five months. Over a million men were killed or wounded, and it was the first time that a tank was used in combat.

Animals during World War 1

Both on the battlefield and back at home, some incredible creatures helped to transport soldiers and goods - and save lives.

Almost a million horses were involved in the war. Soldiers on horseback were known as the Cavalry and horses also pulled some of the gigantic guns, ambulances and supply wagons. Gas from horse droppings could even be used to power lamps!

British families gave their pet dogs to the army so they could carry messages in special tubes on their collars (see above). Dogs were fast, difficult to shoot at, and they also caught rats! Pet pigeons were drafted in to carry messages over long distances, often carrying news from the Front Line back to Britain - Germans trained hawks to kill any carrier pigeons they saw. Goldfish did their bit too - after gas attacks, the gas masks were washed and rinsed. And if the rinsing water killed a goldfish that was placed in it, that meant the masks still had poison on them!

Did you know that we have a FREE downloadable War Horses: WWI primary resource? Great for teachers, homeschoolers and parents alike!

What was life like in Britain during World War 1?

Just because you weren't in the battle fields didn't mean you weren't in the danger zone. Back on the Home Front, Britain was under attack from all sides.

It was the first time in history that Britain had come under threat from the sky. Gigantic German airships, known as Zeppelins (below), carried out 52 bombing raids on Britain during the war - killing more than 500. People were terrified of them! To avoid Zeppelin attacks, no lights could be used after sunset and loud noises were banned, too. Large scale bombing raids on British cities were carried out during the day by German biplanes called Gothas.

There were threats from the sea, too. Scarborough, Hartlepool and Whitby were the first seaside towns to be shelled by the German navy. Battlecruisers, ships with huge guns, launched a surprise attack on 16 December 1914 - 137 people were killed and 592 injured that night alone.

But all these attacks on ordinary people only stirred up hatred against the enemy, encouraging more British men to volunteer and fight for their country against "The Beast". At the start of the war there were just 350,000 men in the British army. But by 1917, there were 3.5 million! Mind you, in 1916, conscription came in - a rule that said ALL healthy men aged 18 - 41 had to fight.

Women during World War 1

Women weren't allowed to join the army, but the war still completely changed their lives - in some ways, for the better!

Before the war, a woman's role was in the home. But with the men away at war, help was needed in the workplace - and so millions of women went to work in offices, factories, shops, transport and on farms. Many men were horrified by the idea of females working and, even worse, wearing trousers! But the women proved that they could do the work of men, and do it just as well. Without the women of Britain growing food and making weapons, the war could not have been won.

When the war was over and the soldiers came home, women were made to leave their new jobs and go back into the home. But not all of them wanted to do that anymore! Their experiences during the war eventually led to women getting more freedoms and rights - including the right to vote!

Children during World War 1

Did you know that Boy Scouts and Girl Guides had a vital role on the Home Front? Girl Guides would make basic medical equipment for wounded soldiers, like bandages, swabs and slings. They also worked growing vegetables and delivering milk. Boy Scouts collected eggs for injured troops, protected roads and railway lines, and delivered messages.

Children were even paid to collect conkers which could be turned into explosives! They also wrote letters to soldiers and helped to knit socks and scarves for the troops in the winter months. Some boys lied about their age and went off to fight. The youngest of these, Sidney Lewis, was just 12 years old when he joined the army. He was sent home at the age of 13 after fighting in the Battle of the Somme, one of the war's bloodiest battles.

Children were also used to carry messages for MI5, the British Secret Service. The Boy Scouts, who were MI5's first choice for this work, apparently found it hard to keep sensitive secrets, so Britain's agents turned to the Girl Guides, instead!

Believe it or not, Winnie The Pooh has his roots in World War 1 Britain. At the time, a young bear cub called Winnie was one of the most popular attractions at London Zoo. He was a mascot belonging to the Canadian Army, who had been left there for safekeeping. The bear was seen by author A. A. Milne's son Christopher Robin, who renamed his own toy bear Winnie - and it became the inspiration for his dad's book, Winnie The Pooh!

Armistice Day

On the 11th hour of the 11th day of the 11th month in 1918, World War 1 officially ended when an agreement (known as an armistice) was signed by Germany and the Allies. This date is known as Armistice Day, and is still commemorated each year when people wear paper poppies to remember those who fought and died in conflicts around the world - the pretty red flowers were the only things that grew on the bloody battlefields of Western Europe.

Sadly, by the time World War 1 was over, more than 18 million people had been killed worldwide. It was hoped it would be the war to end all wars. But this wasn't to be the case. Just 21 years later, World War 2 broke out.

Your connections to World War 1

What can you find out about your family's involvement in World War 1? Ask your grandparents whether their parents, aunties or uncles ever talked about life during this time. Do you have any postcards or photographs from the war? Perhaps there are campaign medals belonging to a relative at home? Write in and tell us about it, we'd love to hear your family stories!

What did you make of our World War 1 facts? Let us know by leaving us a comment, below!

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World War 1 facts for kids | National Geographic Kids

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Explore this fascinating part of British history in our World War 1 facts. Why did World War 1 start? What was life like in the trenches? How did it end?

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FIRST WORLD WAR | Educational Video for Kids

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The First World War (WWI) was fought from 1914 to 1918 and the Second World War (or WWII) was fought from 1939 to 1945. They were the largest military conflicts in human history. Both wars involved military alliances between different groups of countries.

World War I (a.k.a the First World War, the Great War, the War To End All Wars) was centered on Europe. The world warring nations were divided into two groups namely 'The Central Powers' and 'The Allied Powers'. The central powers group consisted of Germany, Austria-Hungary, Turkey and Bulgaria. The Allied powers group consisted of France, Britain, Russia, Italy, Japan, and (from 1917) the U.S.

World War II (a.k.a the Second World War), the opposing alliances are now referred to as 'The Axis' and 'The Allies'. The Axis group consisted of Germany, Italy, and Japan. The Allies group consisted of France, Britain, the U.S., the Soviet Union, and China. World War II was especially heinous because of the genocide of Jewish people perpetrated by the Nazis.

Causes of the War

World War I Trigger

The assassination of Archduke Franz Ferdinand of Austria on 28 June 1914, the heir to the throne of Austria-Hungary was the trigger for the war. He was killed by Serbian nationalists.

Austria-Hungary invaded Serbia.

At same time Germany invaded Belgium, Luxembourg and France

Russia attacked Germany

Several alliances formed over the past decades were invoked, so within weeks the major powers were at war; as all had colonies, the conflict soon spread around the world.

This video from Yale explains the events that led to World War I:

Causes of World War II

The Versailles Treaty signed at the end of World War I not only lay the moral blame of the conflict on Germany but also forced the Germans to make huge payments to the victors of the war. France and Britain needed these reparations payments in order to pay down their own debts. But they were highly onerous, arguably unjustifiably so, and were deeply unpopular in Germany. Hitler seized on this growing resentment and promised to "undo this injustice and tear up this treaty and restore Germany to its old greatness". In fact, the payments demanded were so large that Germany was able to repay the final installment of interest on this debt only on October 3, 2010. The following causes of World War II are generally acknowledged:

Treaty violations and acts of aggression on various fronts.

Political and economic instability in Germany, combined with bitterness over its defeat in World War I and the harsh conditions of the Treaty of Versailles.

Rise of power of Adolf Hitler and the Nazi Party. In the mid-1930s Hitler began secretly to rearm Germany, in violation of the treaty.

Adolf Hitler signed alliances with Italy and Japan to oppose the Soviet Union

German invasion of Poland on Sept. 1, 1939

The following documentary delves into the causes of World War II:

Sequence of events

World War I

The sequence of events for World War I began in 1914 with Austria-Hungary declaring war on Serbia on 28 July 1914 in a bid to reassert its authority as a Balkan power. With war breaking out between Austria-Hungary on one side and Serbia on the other, Europe quickly fell back to the alliances nations had formed. Austria-Hungary and Germany were allies. Serbia was allied with Russia; as was France. Russia aided Serbia and attacked Austria. So Austria-Hungary was fighting in two fronts with Serbia and with Russia and consequently lost on both fronts. In a bid to aid Austria-Hungary against Russia, and fearing an attack from France, Germany mobilized its army and attacked France.

1915

The French, redeploying round Paris, together with the British, checked the now extended German armies on the Marne. In March and April 1915 British sea and land forces attacked the Dardanelles. The Turks countered both threats, causing the British to evacuate the Gallipoli peninsula at the end of 1915.

A joint Austro-German offensive at Gorlice-Tarnow (2 May 1915) unlocked Russian Poland and the tsar's shattered armies fell back

In 1915 the Allies agreed that simultaneous attacks on all fronts were the way to drain the reserves of the Central Powers

1916

On 21 February 1916 Germans attacked the Verdun salient; however this attack was stalled in June. Austrians' independent offensive against the Italians in the Trentino also stalled.

1917

Germany finally adopted unrestricted submarine warfare in February 1917, and in doing so drove America into the war.

1918

The Germans extended their front while reducing their strength by almost a million men. Simultaneously they continued to advance in the east, competing with their Austrian allies in the Ukraine and the Turks in the Caucasus. * The French counter-attacked in July and the British in August. Together with the Americans, they drove the Germans back in a series of individually limited but collectively interlocking offensives.

On 15th September the Anglo-French forces at Salonika attacked in Macedonia, forcing the Bulgars to seek an armistice by the end of the month.

The whole of the Central Powers' Italian front crumbled after the Austrian defeat on the Piave in June.

The German high command initiated the request for an Armistice on 4 October. After the war Germany claimed that the army was 'stabbed in the back' by revolution at home. The people of Germany and Austria-Hungary were battered by food shortages and inflation.

On 11 November an armistice with Germany was signed in a railroad carriage at Compiègne. At 11 a.m. on 11 November 1918 a ceasefire came into effect.

1919 A formal state of war between the two sides persisted for another seven months, until signing of the Treaty of Versailles with Germany on 28 June 1919

World War II

The war that broke out in 1939 was a war for the European balance of power. The immediate cause of the conflict was the German demand for the return of Danzig and part of the Polish 'corridor' granted to Poland from German territory in the Versailles Treaty of 1919. Poland refused to agree to German demands, and on 1 September 1939 overwhelming German forces launched the Polish campaign and defeated her in three weeks. Russia also invaded eastern Poland. Poland thus got divided into two parts. In March 1939 Britain and France had guaranteed Polish sovereignty, and in honor of that pledge first demanded that German forces withdraw, and then on 3 September declared war on Germany. America was committed by the Neutrality Acts of 1935 and 1937 of non-intervention in overseas conflicts.

This video presents a concise history of the events of World War II:

1940

German armies invaded Belgium, Luxembourg, and northern France and within six weeks defeated western forces.

Britain was able to resist German air attacks in the battle of Britain in August and September 1940, and survived a German bombing offensive (the 'Blitz') in the winter of 1940-1, but it was not possible for Britain to defeat Germany unaided.

On 10 June 1940 Mussolini's Italy declared war on Britain and France.

In December 1940 Hitler turned attention away from Britain and approved BARBAROSSA, the large-scale invasion of the USSR.

America started giving increasing economic assistance to Britain and China following President Roosevelt's pledge to act as the 'arsenal of democracy'.

1941

BARBAROSSA was launched on 22 June 1941 when three million German, Finnish, Romanian, and Hungarian soldiers attacked the whole length of the Soviet western frontier. Soviet Union was shattered.

In North Africa, Commonwealth forces stationed in Egypt drove Italian armies back across Libya by February 1941

In Abyssinia and Somaliland Italian forces were forced to surrender by May 1941.

Italy's complete defeat in Africa was avoided only by Hitler's decision to send German reinforcements under Rommel, and the weak logistical position of Commonwealth forces.

The US navy became closely involved in the battle of the Atlantic in efforts to break the German submarine blockade of shipping destined for Britain. In March 1941 Congress approved the Lend-Lease Bill which allowed almost unlimited material aid, including weapons, for any state fighting aggression. In the autumn of 1941 this came to include the USSR, despite strong American anti-communism. Throughout 1940 and 1941 the USA tightened an economic blockade of Japan which threatened to cut off most Japanese oil supplies.

American actions provoked both Japanese and German retaliation. On 7 December 1941 Japanese naval aircraft attacked the American naval base at Pearl Harbor, followed by the rapid conquest of western colonies in south-east Asia and the southern Pacific.

On 11 December Germany declared war on the USA.

1942

Russia made a remarkable recovery and in November Germany and her allies attacking Stalingrad (now Volgograd) were cut off by a massive Soviet encirclement, URANUS.

In November 1942 at Alamein a predominantly Italian force was defeated by Montgomery.

The USA fought a largely naval and air war between 1942 and 1945, using its very great naval power to deploy troops in major amphibious operations, first in the Solomon Islands to halt the Japanese Pacific advance, then in TORCH, a combined American-British landing in Morocco and Algeria in November 1942.

1943

The entry of the USA signaled a change in the political balance of the war of great significance. German forces in Stalingrad surrendered in January 1943and by May 1943 Italian and German forces finally surrendered in Tunisia, enabling the Allies to mount the invasion of Sicily and then Italy. Italy sued for an armistice in September 1943.

1944

American economic might and political interests helped to bind together the different fronts of conflict, while America's worldwide system of supply and logistics provided the sinews of war necessary to complete the defeat of the aggressor states. A major intelligence deception operation and declining air power weakened the German response and by September 1944 German forces had been driven from France.

1945

German surrendered on 7 May 1945 following Hitler's suicide on 30 April.

A long-range bombing campaign destroyed the Japanese cities and most of the Japanese navy and merchant marine. America's newest weapon, the atomic bombs were dropped on Hiroshima and Nagasaki in August 1945.

Soviet forces destroyed the Japanese army in Manchuria; Japan finally capitulated on 2 September.

War strategies

Many of the weapons that dominate military operations today were developed during World War I, including the machine gun, the tank and specialized combat aircraft. This is a great video that explains the military strategies and tactics used during World War I.

Outcomes

World War I

After the war, the Paris Peace Conference imposed a series of peace treaties on the Central Powers. The 1919 Treaty of Versailles officially ended the war. Building on Wilson's 14th point, the Treaty of Versailles also brought into being the League of Nations on 28 June 1919. In signing the treaty, Germany acknowledged responsibility for the war, agreeing to pay enormous war reparations and award territory to the victors. It caused a lot of bitterness.

Austria-Hungary was partitioned into several successor states.

The Russian Empire lost much of its western frontier as the newly independent nations of Estonia, Finland, Latvia, Lithuania, and Poland were carved from it.

World War II

The war ended with the total victory of the Allies over Germany and Japan in 1945. The United Nations was established to foster international cooperation and prevent future conflicts.

The Soviet Union and the United States emerged as rival superpowers.

Although the totalitarian regimes in Germany, Italy, and Japan were defeated, the war left many unresolved political, social, and economic problems in its wake and brought the Western democracies into direct confrontation with their erstwhile ally, the Soviet Union under Josef Stalin, thereby initiating a period of nearly half a century of skirmishing and nervous watchfulness as two blocs, each armed with nuclear weapons, faced each other probing for any sign of weakness.

The European economy had collapsed with 70% of the industrial infrastructure destroyed.

A rapid period of decolonization also took place within the holdings of the various European colonial powers. These primarily occurred due to shifts in ideology, the economic exhaustion from the war and increased demand by indigenous people for self-determination.

References

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What's the difference between World War I and World War II? The First World War (WWI) was fought from 1914 to 1918 and the Second World War (or WWII) was fought from 1939 to 1945. They were the largest military conflicts in human history. Both wars involved military alliances between different groups of countries....

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Kids learn about World War II in history. Educational articles for teachers, students, and schools including WWII battles, leaders, generals, countries, Allied vs. Axis powers, Europe, Germany, Hitler, Holocaust, atomic bomb, daily life, weapons, and causes.

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DK Learning: Make every lesson your best yet

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DK's uniquely visual approach engages students, enhancing their learning experience

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Featured

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 [...]
Read more Read more about World War I Battles: Timeline

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World War I: Causes and Timeline | HISTORY

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World War I was fought from 1914 to 1918. Learn more about World War I combatants, battles and generals, and what caused World War I.

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World War II: Summary, Combatants & Facts

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World War II was a global war that lasted from 1939 to 1945. Rising to power in an unstable Germany, Adolf Hitler and his National Socialist (Nazi Party) rearmed the nation and signed treaties with Italy and Japan to further his ambitions of world domination. Hitler’s invasion of Poland drove Great Britain and France to declare war on Germany, and World War II had begun. The majority of the world’s countries eventually formed two opposing alliances: the Allies and the Axis.

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Poland

On September 1, 1939, Germany invaded Poland. This began World War II. The Germans used a new kind of attack. They called it blitzkrieg, or "lightning war." Blitzkrieg relied on fast-moving tanks and warplanes to shock the enemy into surrendering.

After this invasion, Britain and France declared war on Germany. Australia, New Zealand, Canada, India, and South Africa joined Britain on the side of the Allies. But no one could help when the Soviet Union attacked Poland on September 17. Germany and the Soviet Union divided Poland between them. The Soviet Union also invaded Latvia, Lithuania, Estonia, and Finland during 1939.

Scandinavia and the Low Countries

Between April and June 1940 the Germans took over Norway and Denmark. In May they moved into the Low Countries- Belgium, the Netherlands, and Luxembourg.

France

In mid-May 1940 the first German troops crossed into France. By June 14 the Germans had entered Paris, the French capital.

On June 22 France agreed to let Germans rule most of their country. However, many French people continued to fight the Germans. They were called the Free French. They took orders from Charles de Gaulle. De Gaulle's headquarters were in Britain.

As France was falling to the Germans, Italy declared war against France and Britain. On June 10, 1940, Italy entered the war as an Axis power.

Great Britain

Hitler's next target was the island of Great Britain. Starting in June 1940, German warplanes began bombing Britain. However, the British had a new invention called radar. Radar warned the British when German aircraft were nearing. British fighter airplanes shot down many attackers. This battle, called the Battle of Britain, was the world's first major battle fought in the air.

The Germans soon decided not to invade Britain. Instead, they dropped more bombs on London and other cities until May 1941.

The Atlantic Ocean

The British also fought the German navy. Early in the war, the Germans sank many of the supply ships that delivered food and weapons from North America. In 1943 the Allies began to use aircraft carriers to protect convoys, or groups, of supply ships. The number of supply ships reaching Britain then increased.

North Africa

In the autumn of 1940 the Italians invaded Egypt. They wanted to control the Suez Canal, which linked the Mediterranean Sea to the Red Sea and the Indian Ocean. However, the British drove the Italians back.

Then the German general Erwin Rommel led the Germans to victories in North Africa. In 1942 British forces finally stopped Rommel in two battles at El-Alamein, Egypt. By November 6 the British had driven the Germans from Egypt.

The Soviet Union

After conquering the countries on Germany's borders, Hitler invaded the Soviet Union. The attack began on June 22, 1941. The Soviet Union joined the Allies soon afterward. The Soviets stopped the Germans on the edges of Moscow (the Soviet capital) and Leningrad (now Saint Petersburg).

In 1942 Hitler decided to take the Soviet city of Stalingrad (now Volgograd). The fight at Stalingrad was the largest single battle in World War II. About 1.9 million soldiers died on both sides. The Germans surrendered in January 1943. After Stalingrad, the Soviets gradually drove out the Germans.

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World War II started in 1939. By the time it ended in 1945, the war involved nearly every part of the world. The two sides that fought the war were called the Axis powers and...

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When Britain and France went to war with Germany in 1939, Americans were divided over whether to join the war effort. It wouldn't be until the surprise attacks on Pearl Harbor in December 1941 that the United States would be thrust into World War II. Once U.S. troops were sent to the front lines, hundreds of artists were put to work to create posters that would rally support on the home front.

Citizens were invited to purchase war bonds and take on factory jobs to support production needs for the military. As men were sent to battlefields, women were asked to branch out and take on jobs as riveters, welders and electricians.

To preserve resources for the war effort, posters championed carpooling to save on gas, warned against wasting food and urged people to collect scrap metal to recycle into military materials. In the spring of 1942, rationing programs were implemented that set limits on everyday purchases.

While many posters touted positive patriotic messages, some tapped fear to rally support for the Allied side and caution against leaking information to spies. "Loose lips sink ships" became a famous saying. Meanwhile, graphic images depicted a blood-thirsty Adolph Hitler and racist imagery of Japanese people with sinister, exaggerated features.

Today, the posters a offer a glimpse into the nation's climate during World War II and how propaganda was used to link the home front to the front lines.

Fact Check

We strive for accuracy and fairness. But if you see something that doesn't look right, click here to contact us! HISTORY reviews and updates its content regularly to ensure it is complete and accurate.

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These World War II Propaganda Posters Rallied the Home Front | HISTORY

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As the U.S. sent troops to the front lines, artists were recruited to encourage those at home to do their part.

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Kids learn about the biography of Adolf Hitler, leader and dictator of Germany during World War II. His Nazi party committed the Holocaust.

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Kids learn about the biography of Winston Churchill, British Prime Minister during World War II. A great leader and statesman.