Wars on Map

First World War

World War I Map & Timeline: 1914–1918

The First World War is remembered as static, and on one front it was. But the map of 1914 moves fast — armies crossing Belgium, meeting on the Marne, swinging around each other in a race to the sea — and then stops. Understanding the war means understanding both halves of that: six weeks of movement, followed by four years in which the line in France and Flanders shifted by a few tens of kilometres at a cost of millions of lives.

Sources checked 2026-09-11 · Estimates are given as ranges, not single figures

8.5–9.5mMilitary dead, the range most casualty compilations converge on.
15–19mTotal deaths including civilians. The upper end includes famine and epidemic deaths attributed to the war.
700kmApproximate length of the western front once it was continuous, from the North Sea to the Swiss border.

How the fronts formed

Germany’s plan for a two-front war required beating France quickly, so its right wing swung through neutral Belgium from 4 August 1914. The French counter-attacked into Lorraine and lost heavily. By early September the German advance had reached the Marne, within 50 kilometres of Paris, where a French and British counter-attack between 5 and 12 September forced it back to the Aisne.

What followed was not a stalemate by design. Both sides tried repeatedly to get around the other’s open northern flank — the so-called race to the sea — until there was no flank left to turn. By late November 1914 a continuous line of field fortifications ran from the Belgian coast to the Swiss frontier, and the only way forward was through it.

In the east the geography never closed like that. The front was more than twice as long, the force-to-space ratio far lower, and offensives continued to produce movement of hundreds of kilometres: Tannenberg in August 1914, the Gorlice-Tarnów breakthrough in May 1915, the Brusilov offensive in 1916, and the German advance after Russia left the war.

Sources
Keegan, J. (1998), The First World War. HutchinsonStrachan, H. (2001), The First World War, Volume I: To Arms. Oxford University Press

Timeline of the First World War

The catalogue codes the war as running from 29 July 1914 — the day Austro-Hungarian artillery opened fire on Belgrade — to the armistice of 11 November 1918, with a separate combat period recorded for each of the fifteen participants.

  1. 28 June 1914Archduke Franz Ferdinand is assassinated in Sarajevo

    Austria-Hungary issues an ultimatum to Serbia on 23 July.

  2. 28–29 July 1914Austria-Hungary declares war on Serbia and bombards Belgrade

    The catalogue’s start date is the bombardment rather than the declaration.

  3. 1–4 August 1914The alliances mobilise

    Germany declares war on Russia on 1 August and France on 3 August, invades Belgium on 4 August, and Britain declares war on Germany the same day.

  4. 26–30 August 1914Battle of Tannenberg

    The Russian Second Army is destroyed in East Prussia.

  5. 5–12 September 1914First Battle of the Marne

    The German advance on Paris is halted and pushed back to the Aisne.

  6. November 1914The western front becomes continuous

    Trench lines run from the North Sea to Switzerland. The Ottoman Empire enters the war on the Central Powers’ side.

  7. 22 April 1915First large-scale German gas attack at Ypres

    Chlorine released against French colonial and Canadian troops.

  8. 25 April 1915Allied landings at Gallipoli

    The campaign fails to force the Dardanelles; the peninsula is evacuated by 9 January 1916.

  9. 23 May 1915Italy declares war on Austria-Hungary

    Opening a mountain front along the Isonzo and in the Alps that will see eleven Italian offensives in two years.

  10. 21 February – 18 December 1916Battle of Verdun

    Ten months of attritional fighting over a fortified salient, with combined casualties usually estimated between 700,000 and 900,000.

  11. 31 May – 1 June 1916Battle of Jutland

    The only full fleet action of the war. Britain loses more ships; the German High Seas Fleet returns to port and stays there.

  12. 1 July – 18 November 1916Battle of the Somme

    British casualties on the first day alone are 57,470, of whom 19,240 are killed.

  13. 4 June – 20 September 1916Brusilov offensive

    The most successful Russian operation of the war, and one that also exhausts the Russian army.

  14. 1 February 1917Germany resumes unrestricted submarine warfare

    The United States declares war on 6 April 1917.

  15. 31 July – 10 November 1917Third Battle of Ypres (Passchendaele)

    An advance of roughly eight kilometres for around 250,000 casualties on each side.

  16. 3 March 1918Treaty of Brest-Litovsk

    Russia leaves the war, freeing German divisions for the west.

  17. 21 March 1918German spring offensives begin

    Operation Michael breaks the British line near Saint-Quentin and advances some 60 kilometres — the largest movement in the west since 1914.

  18. 18 July – 6 August 1918Second Battle of the Marne

    The final German offensive is stopped and reversed.

  19. 8 August 1918Battle of Amiens

    Ludendorff calls it the black day of the German army. The Hundred Days offensive drives the Germans back continuously until the armistice.

  20. 11 November 1918Armistice

    Signed at 05:00 in a railway carriage at Rethondes and effective at 11:00 Paris time. The Treaty of Versailles follows on 28 June 1919.

Sources
Keegan, J. (1998), The First World War. HutchinsonStrachan, H. (2001), The First World War, Volume I: To Arms. Oxford University PressSheffield, G. (2001), Forgotten Victory: The First World War — Myths and Realities. HeadlineClodfelter, M. (2017), Warfare and Armed Conflicts: A Statistical Encyclopedia, 4th ed. McFarland

Why the western front looks wrong on most maps

A map showing the western front in 1915 and again in 1917 with two lines a centimetre apart tells the truth about territory and almost nothing about the war. The Somme cost Britain, France and Germany well over a million casualties between them and moved the line by about ten kilometres. Verdun moved it by less.

That is the honest difficulty with mapping this war: the meaningful variable was not position but cost, and cost does not have coordinates. The map in this atlas therefore treats the First World War as the catalogue does — a single record with a set of theatres — rather than drawing a front line whose small annual shifts would imply that little happened.

The eastern, Italian, Balkan, Caucasian and Middle Eastern fronts do move on a map, and so do the campaigns in Africa and the Pacific, where German colonies were taken in the first months of the war. The war was global in a real sense from 1914; it is the western front that resists cartography.

Sources
Keegan, J. (1998), The First World War. HutchinsonSheffield, G. (2001), Forgotten Victory: The First World War — Myths and Realities. Headline

How many people died in the First World War?

Military death figures for the First World War are firmer than those for the Second, because most of the belligerents kept unit records and published post-war accounts. Civilian figures are far weaker, and the total depends heavily on three decisions: whether to include the Armenian genocide, whether to include famine deaths in the Ottoman Empire and central Europe, and whether to include the 1918–19 influenza pandemic, which killed more people worldwide than the war did.

CountryMilitary deadNote
Germany1.8–2.0 millionThe largest national military loss of the war
Russia1.7–2.3 millionRecords disrupted by revolution and civil war; estimates vary widely
FranceAbout 1.4 millionRoughly 4% of the pre-war population, the highest proportion among the major western powers
Austria-Hungary1.1–1.5 millionCounted across the empire’s successor states
British EmpireAbout 1.0 millionIncluding roughly 745,000 from the United Kingdom
Ottoman Empire0.8–1.0 millionA high proportion from disease rather than combat
ItalyAbout 650,000Overwhelmingly on the Isonzo and Alpine fronts
Serbia and MontenegroAbout 300,000 militaryProportionally the heaviest total losses of any belligerent once civilian deaths are added
United StatesAbout 116,500Slightly more than half from disease, chiefly influenza

Civilian deaths are not tabulated here because the categories are not comparable between countries. The Armenian genocide from 1915 alone is estimated to have killed on the order of one million people and more, and is counted in some war totals and not others.

Sources
Clodfelter, M. (2017), Warfare and Armed Conflicts: A Statistical Encyclopedia, 4th ed. McFarlandWinter, J. M. (1986), The Great War and the British People. MacmillanKeegan, J. (1998), The First World War. HutchinsonSuny, R. G. (2015), "They Can Live in the Desert but Nowhere Else": A History of the Armenian Genocide. Princeton University Press

Open the atlas at 1916 — Verdun, the Somme, Jutland and the Brusilov offensive ↗