War of movement
The illusion of a short war: frontiers battles, the Marne, the Race to the Sea, Tannenberg.
Milestones in order. This is history, not a weekly activity grid.
- Sarajevo
- Marne
- Gallipoli and gas
- Verdun and the Somme
- US declaration
- Bolshevik Revolution
- German spring offensives
- Breaking the Hindenburg Line
- Armistice
- Versailles signed
Darker cells mean a higher score for this topic on that metric.
Scale88
Intensity90
Duration48
Tech shift85
Political impact92
Cultural memory88
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Quick answers
Are the scores a ranking of nations or armies?
No. Scores are browsing aids inside an era-bounded atlas — not live league tables of countries.
How many died?
About 15-22 million dead is the usual scholarly band, plus the 1918-19 influenza that killed tens of millions more worldwide, including many already weakened by the war. Military dead are better counted than civilians.
Why did it start?
No single cause. Alliance commitments, militarism, imperial rivalry, the Balkan crises, and a July 1914 diplomatic failure all appear in standard accounts. Historians still argue about German war aims and shared responsibility.
Why is the Western Front so famous in English?
That is where British, dominion and (from 1917) US armies fought longest. Poetry, photography and the density of cemeteries in France and Flanders created a portable memory. Other fronts were as deadly for those who fought there.
What was the Treaty of Versailles?
The 1919 treaty with Germany: territorial losses, disarmament clauses, Article 231 ("war guilt"), and reparations. It was one of several treaties. The US never ratified it.
Did tanks and aircraft decide the war?
They mattered increasingly in 1918, together with artillery-infantry methods and German economic collapse. They did not make 1916 "modern" in the later Second World War sense.
The July Crisis is one of the most studied fortnights in diplomatic history: mobilisation timetables, the blank cheque, and Britain's Belgian guarantee.
Once the Marne failed to end the war, 1915-17 became a laboratory of attrition that societies had not budgeted for.
Timeline
- Sarajevo
Franz Ferdinand assassinated on 28 June. The July Crisis ends with general war in early August.
- Marne
Allied counterstroke on the Marne stops the German advance on Paris; the front begins to ossify.
- Gallipoli and gas
Allied landings at Gallipoli fail by January 1916. Chlorine is used at Ypres in April. The Armenian genocide unfolds in the Ottoman Empire.
- Verdun and the Somme
German attack on Verdun (February); Somme offensive from 1 July, with first tank use in September. Casualties in the hundreds of thousands on each battle.
- US declaration
The United States declares war on Germany on 6 April after unrestricted U-boat warfare and the Zimmermann Telegram.
- Bolshevik Revolution
Russia's second 1917 revolution leads toward Brest-Litovsk and the exit of a great eastern ally.
- German spring offensives
Ludendorff's offensives gain ground but not decision; US numbers and Allied coordination under Foch tell in the summer.
- Breaking the Hindenburg Line
Allied Hundred Days offensives, including Australian, Canadian and US corps, force a German request for armistice.
- Armistice
Fighting in France stops at 11:00 on 11 November. Kaiser Wilhelm II has abdicated; Germany is a new republic.
- Versailles signed
German delegation signs on 28 June 1919 in the Hall of Mirrors -- five years to the day after Sarajevo.
Eras
Fortress war
Gas, Gallipoli, Verdun, the Somme -- industrial attrition becomes the Western method.
Crisis and entry
Mutinies, revolution in Russia, unrestricted U-boats, US entry, Passchendaele.
Decision
German spring offensives, then Allied Hundred Days and collapse of the Central Powers.
Peacemaking and aftershocks
Paris treaties, League, Turkish War of Independence, Russo-Polish War -- violence did not clock off in November.
Milestones
Mass conscription
European states learned to feed millions of men into a years-long war -- the template for 1939.
Memorial culture
Unknown soldiers, cenotaphs and 11 November created the modern public language of mourning.
Imperial shatter
Four empires gone; new nation-states and mandates redrew Eurasia.
The armistice clock -- the eleventh hour -- is ritual. The wars of succession in Russia, Anatolia and Ireland were already running.
Article 231 and the "war guilt" phrase did more political damage than many territorial clauses.