World War I (28 July 1914 – 11 November 1918) changed the political map more than anything since the Napoleonic Wars. Four empires vanished, almost ten new states appeared in Europe, and borders were drawn across the Middle East that largely survive today.
Map of Europe in 1914
On the eve of the war Europe was dominated by great powers, most of them monarchies:
- the German Empire, the strongest state on the continent, united in 1871;
- Austria-Hungary, the multinational Habsburg monarchy from Bohemia to Bosnia;
- the Russian Empire, which included Poland, Finland and the Baltic lands;
- the Ottoman Empire, which had lost almost all its European territory but still held the Middle East;
- the French Third Republic and the Kingdom of Great Britain, each with a vast colonial empire;
- the Kingdom of Italy, and in the Balkans Serbs, Bulgaria, Romania, Greece and Montenegro.
Poland, Czechoslovakia, Yugoslavia, Finland, Latvia, Lithuania and Estonia did not yet exist. Europe in 1914
Who fought whom
| Allies (Entente) | Central Powers |
|---|---|
| Russia (until 1918) | Germany |
| France | Austria-Hungary |
| British Empire | Ottoman Empire (from Nov 1914) |
| Serbia, Belgium, Montenegro | Bulgaria (from Oct 1915) |
| Japan (1914) | |
| Italy (from 1915), Romania (from 1916) | |
| United States (from 1917), Greece (from 1917) |
The trigger was the assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, in Sarajevo on 28 June 1914. A month later Austria-Hungary declared war on Serbia, and within a week the alliance system had pulled every European great power into the war.
The fronts of World War I
- Western Front — from the English Channel to Switzerland through Belgium and north-eastern France. After the Marne in autumn 1914 it barely moved for four years: Verdun, the Somme, Passchendaele.
- Eastern Front — from the Baltic to Romania: Galicia, Poland, the Baltic. Here the line moved hundreds of kilometres — the Great Retreat of 1915, the Brusilov Offensive of 1916.
- Italian Front — in the Alps and along the Isonzo, from 1915.
- Balkan (Salonika) Front — Serbia and Macedonia.
- Caucasus and Middle East — Transcaucasia, Mesopotamia, Palestine, the Gallipoli campaign at the Dardanelles and the The Arab Revolt.
1917–1918: Russia leaves and the war ends
After the February Revolution and the October Revolution of 1917, Russia left the war: under the Treaty of Brest-Litovsk in March 1918 it gave up Poland, the Baltic lands, Finland, Ukraine and part of Belarus. Germany's last offensive in the West in spring 1918 failed, and with American troops arriving the Allies counter-attacked. Bulgaria, the Ottoman Empire and Austria-Hungary surrendered in the autumn; on 11 November 1918 Germany signed the Armistice of Compiègne. Europe in 1918
Map of Europe after World War I
The Treaty of Versailles with Germany (1919) and the treaties with its allies — Saint-Germain, Trianon, Neuilly and Sèvres — changed the map:
- Four empires fell — the Russian, German, Austro-Hungarian and Ottoman.
- New states: the Second Polish Republic, Czechoslovakia, the Republic of Finland, the Republic of Latvia, Lithuania, Estonia, separate Austria and Hungary, and the Kingdom of Serbs, Croats and Slovenes — later Yugoslavia (Kingdom of Serbs, Croats and Slovenes).
- Germany returned Alsace-Lorraine to France, gave Poland a corridor to the Baltic and lost all its colonies.
- The Middle East was divided between Britain and France as League of Nations mandates, largely following the Sykes–Picot Agreement: the French Mandate for Syria and Lebanon and British Iraq, Palestine and Transjordan. The Proclamation of the Republic of Turkey replaced the Ottoman Empire in 1923.
- After the Russian Civil War, the Soviet Union took the place of the Russian Empire (Formation of the USSR).
Compare 1914 and 1920 on the globe: move the timeline and watch the empires disappear and new borders appear. Europe in 1920
Questions
Which countries fought in World War I?
The Allies — Russia, France, the British Empire and later Italy, Romania, the United States, Greece, Japan, Serbia, Belgium and others. The Central Powers — Germany, Austria-Hungary, the Ottoman Empire and Bulgaria. In all, 38 states took part.
Which empires collapsed after World War I?
Four: the Russian (1917), the German and Austro-Hungarian (1918) and the Ottoman (finally in 1922). New states took their place.
Which countries were created after World War I?
Poland, Czechoslovakia, the Kingdom of Serbs, Croats and Slovenes (Yugoslavia), Finland, Estonia, Latvia, Lithuania, Austria and Hungary as separate states, and later the Republic of Turkey and the USSR.