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The First World War

How rivalries, alliances and government decisions widened the crisis of 1914; why many trench attacks gained little ground; how civilians experienced the war; and how the 1919 settlement contributed to later tensions.

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What a learner can do afterwards

  • Identify the assassination that triggered the 1914 crisis and explain how alliances and government decisions widened it
  • Describe trench warfare on the Western Front and explain why many attacks gained little ground
  • Describe home-front changes, including rationing, conscription and women's wartime employment, recognising that policies varied
  • Explain how resentment over the 1919 settlement contributed to later tensions without making another war inevitable

1 · Read

Rivalries between empires, growing armies and navies, and nationalist demands had raised tensions for years. These were underlying causes. On 28 June 1914, Gavrilo Princip, a Bosnian Serb nationalist, assassinated Archduke Franz Ferdinand in Sarajevo. The killing triggered a crisis between Austria-Hungary and Serbia. It did not make a world war unavoidable.

Germany backed Austria-Hungary; Russia supported Serbia; France was allied with Russia. Mobilisation meant preparing armed forces for war. Governments chose mobilisation and war. Germany declared war on Russia and France and invaded neutral Belgium. Britain entered after that invasion, influenced by treaty obligations and fears of German dominance. Alliances helped widen the crisis; they did not order every country to fight.

28 Jun: assassination28 Jul: war on Serbia4 Aug: Britain enters
These selected dates show the crisis widening. Decisions made between them help explain why the war spread.

On the Western Front, armies dug trenches for shelter. Between the lines was open ground called no man's land. Wire slowed attackers under machine-gun and artillery fire, so many attacks caused heavy losses for small gains. A long stalemate followed, but it did not cover every front or year. There was more movement on the Western Front in 1914 and 1918. Armies changed tactics and used new equipment, including tanks.

The home front was civilian life and work supporting the war. Some governments rationed food, limiting how much people could buy. Many countries used conscription, compulsory military service. More women entered factories, transport and offices, though women had paid jobs before 1914. Policies varied by country and over time. Food, production and morale affected the war alongside battles and military decisions.

Food shortagesRation allowanceLimited purchases
Rationing limited purchases of certain foods. It did not mean that food shortages had ended.

The armistice of 11 November 1918 stopped fighting on the Western Front. The Treaty of Versailles followed in 1919. It required Germany to pay reparations, payments for war damage, and give up territory and military strength. Germany and its allies were assigned responsibility for wartime losses as a basis for reparations. Many Germans resented the treaty. This contributed to later tensions; the settlement did not make another world war inevitable.

The earlier lesson showed how empires drew on colonial labour and resources. In this war, soldiers, workers and supplies came from overseas territories. Troops from India and Africa served in Europe and elsewhere. Fighting reached Africa, the Middle East and the seas, and countries outside Europe joined. World war describes worldwide involvement. Total war describes directing civilian work, industry and resources towards fighting.

Rivalries, alliances and government decisions widened the war. Fighting and civilian work reached beyond Europe. The settlement contributed to later tensions without making another war inevitable.

Lesson, questions and flashcards written for this dataset.

Readings and flashcards written for this dataset. Linked videos: Khan Academy, 'Blockades, u-boats and sinking of the Lusitania' and 'Zimmermann Telegram'. The videos are third-party works; their usage terms have not been verified.

More to read

Explaining the crisis of 1914

Two questions help separate the outbreak's causes. What happened in June 1914? Why did the crisis that followed become so large?

The first question points to the assassination of Archduke Franz Ferdinand in Sarajevo on 28 June. Gavrilo Princip, a Bosnian Serb nationalist, carried out the killing. Austria-Hungary confronted Serbia. The assassination was a trigger, but identifying it does not explain every government's response.

For the second question, examine relationships and decisions. Germany supported Austria-Hungary. Russia supported Serbia, and France was allied with Russia. Military competition, imperial rivalries and nationalist demands had already increased tensions. Mobilisation prepared forces for war and raised pressure on other governments.

During the crisis, leaders decided whether to negotiate, mobilise or declare war. Germany declared war on Russia and France and invaded neutral Belgium. Britain's entry followed that invasion; treaty obligations and concern about German dominance influenced its decision.

A useful explanation connects those decisions to the pressures already present. It does not treat a treaty or a railway timetable as something that could make political choices disappear.

Following the war beyond Europe

The Western Front is one place to study the war. Its trenches do not show everyone involved or every place where fighting happened.

The empires at war controlled territories far from Europe. Those territories supplied soldiers, workers and materials. Troops from India and Africa served in Europe and other war zones. The earlier lesson on empire helps explain this connection: imperial governments could draw on labour and resources across distant territories.

There were also campaigns in Africa and the Middle East. At sea, naval forces attacked their opponents and threatened supply routes. Blockades and submarine attacks disrupted trade and contributed to shortages and civilian suffering. Countries outside Europe entered the conflict, adding further participants.

Worldwide involvement explains the term world war. Total war refers to a different feature: the direction of civilian work, industry and resources towards the fighting. A civilian making supplies could contribute to that effort without living near a trench.

These terms do not mean that every country fought or that every household had the same experience. They help us distinguish the conflict's geographic reach from the demands it placed on societies.

Why an advance could be costly

To understand a trench attack, compare the protection available to defenders with the exposure of soldiers advancing towards them. Trenches offered shelter, although soldiers in them still faced serious danger.

The open ground between opposing lines was called no man's land. An attacking soldier had to cross it to reach the other side's position. Barbed wire could delay that movement. While attackers struggled forward, machine guns and artillery could fire on them. This combination helps explain why many attacks caused heavy losses without gaining much ground.

It does not explain every battle in the same way. Trench stalemate was a long-lasting feature of the Western Front, but movement there was greater in 1914 and 1918. Campaigns on other fronts could follow different patterns.

Armies also changed their methods during the war. They developed ways to coordinate attacks and used new equipment, including tanks. An invention's arrival did not end stalemate at once. Describing change over time avoids two misleading claims: that tactics never changed and that every attack failed.

Changes on the home front

A home-front account follows civilians through work, shopping and family life. War could change these activities even where there was no nearby battlefield.

Scarce food was one problem. Some governments introduced rationing to limit purchases of particular foods. Conscription addressed a different demand by requiring military service. Neither policy operated in exactly the same way everywhere. The country and date matter when describing what a person faced.

Women's work also needs a before-and-during comparison. Women held paid jobs before 1914. Wartime demand brought more women into factories, transport and offices as governments and businesses sought workers. This expanded employment in those roles; it did not create women's paid employment for the first time.

Civilians could support the war, criticise its conduct or oppose it. Prolonged shortages and deaths contributed to discontent and protest. Food supplies, production and morale affected how long a government could continue fighting.

Those pressures belong in an explanation of the war's outcome alongside military campaigns and political decisions. Saying that the society which lasted longest won leaves those other causes unexplained.

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The First World War · History, ages 14 to 16 · LightMySky