No. 01 · The War to End All Wars

World War I

From the summer of 1914 to the armistice of 11 November 1918, the Great War reshaped empires, borders, and the modern world. Around 70 million soldiers were mobilised, and more than 16 million people lost their lives.

1914 War begins

1918 Armistice signed

~16M Deaths (military & civilian)

30+ Nations involved

Overview

World War I was a global conflict fought between the Allied Powers — principally France, the United Kingdom, Russia, Italy, Japan, and later the United States — and the Central Powers of Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria.

The war’s immediate trigger was the assassination of Archduke Franz Ferdinand of Austria in Sarajevo on 28 June 1914, but its deeper causes lay in militarism, imperial rivalry, nationalism, and a tangled web of alliances that turned a regional crisis into a continental, then global, war.

Allied Powers

France, British Empire, Russia, Italy, Serbia, Belgium, Japan, and from 1917 the United States.

Central Powers

Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria.

Neutral Nations

Spain, Switzerland, Sweden, Norway, the Netherlands, and others.

Timeline

1914
Archduke Franz Ferdinand is assassinated (28 June). Austria-Hungary declares war on Serbia. Germany invades Belgium; Britain declares war. The Battle of the Marne halts the German advance.
1915
Trench warfare hardens on the Western Front. Poison gas is used at Ypres. Italy joins the Allies. Allied landings at Gallipoli fail. A German U-boat sinks the Lusitania.
1916
The longest battles of the war: Verdun and the Somme. Britain introduces conscription. The Battle of Jutland is the war’s largest naval engagement.
1917
Germany resumes unrestricted submarine warfare. The United States declares war in April. The Russian Revolutions overthrow the Tsar and bring the Bolsheviks to power.
1918
Russia signs the Treaty of Brest-Litovsk and exits the war. Germany’s Spring Offensive fails. The Hundred Days Offensive breaks the Hindenburg Line. Armistice on 11 November.

Fronts

Western Front

From the North Sea to the Swiss border, a static line of trenches defined the war. Battles at Ypres, Verdun, and the Somme became symbols of industrialised slaughter.

Eastern Front

A vast, mobile theatre stretching from the Baltic to the Black Sea. Russia fought Germany and Austria-Hungary before collapsing into revolution in 1917.

Italian Front

Fought in the Alps along the Isonzo River and the Piave, where mountain warfare and avalanches claimed thousands of lives.

Gallipoli & the Middle East

Allied campaigns against the Ottoman Empire, including the failed Dardanelles landings and the Arab Revolt.

Technology & Innovation

The Great War was the first truly industrial conflict. New weapons and methods changed warfare permanently — and made it far deadlier.

Machine guns: Enabled small numbers of defenders to stop massed infantry attacks.
Artillery: Caused the majority of casualties; barrages could last for days.
Poison gas: Chlorine, phosgene, and mustard gas introduced a terrifying new weapon.
Tanks: First used by Britain at the Somme in 1916; the Mark IV helped break trench deadlock.
Aircraft: Evolved from observation platforms into fighters and bombers.
Submarines: German U-boats threatened Allied shipping and helped bring the US into the war.

Legacy

The Armistice of 11 November 1918 ended the fighting, and the Treaty of Versailles in 1919 imposed heavy terms on Germany. Four empires — the German, Austro-Hungarian, Ottoman, and Russian — collapsed, and new nations emerged across Europe and the Middle East.

The war’s human cost reshaped societies: it accelerated suffrage, labour movements, and medical advances, but also sowed the grievances that would help ignite a second global war only two decades later.

“They shall not grow old, as we that are left grow old: Age shall not weary them, nor the years condemn.” — Laurence Binyon, “For the Fallen”