Skip to content
1 World War I

History

Dated history of the 1914-1918 war: July Crisis, fronts, 1918 decision and the Versailles system.

Educational history. Casualty figures are documented ranges. This is not operational advice, a ranking of nations, or a how-to for weapons or coups.

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

  1. Sarajevo

    Franz Ferdinand assassinated on 28 June. The July Crisis ends with general war in early August.

  2. Marne

    Allied counterstroke on the Marne stops the German advance on Paris; the front begins to ossify.

  3. 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.

  4. 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.

  5. US declaration

    The United States declares war on Germany on 6 April after unrestricted U-boat warfare and the Zimmermann Telegram.

  6. Bolshevik Revolution

    Russia's second 1917 revolution leads toward Brest-Litovsk and the exit of a great eastern ally.

  7. German spring offensives

    Ludendorff's offensives gain ground but not decision; US numbers and Allied coordination under Foch tell in the summer.

  8. Breaking the Hindenburg Line

    Allied Hundred Days offensives, including Australian, Canadian and US corps, force a German request for armistice.

  9. Armistice

    Fighting in France stops at 11:00 on 11 November. Kaiser Wilhelm II has abdicated; Germany is a new republic.

  10. Versailles signed

    German delegation signs on 28 June 1919 in the Hall of Mirrors -- five years to the day after Sarajevo.

Eras

War of movement

The illusion of a short war: frontiers battles, the Marne, the Race to the Sea, Tannenberg.

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.

HistoryForcesCampaignsCostIconsLegacyAtlas