World War I: Causes, Stages, and Global Impact
Causes of World War I
- Deteriorating Diplomatic Relations: Colonial disputes led to tensions, particularly with Germany’s growing ambitions.
- Formation of Alliances:
- Early Tensions (1855-1890s): Franco-British and Anglo-Russian tensions.
- Final Blocs (Until 1906): The Entente Cordiale (1904) between France and Great Britain, leading to the Triple Entente (France, Great Britain, and Russia). The Triple Alliance (Germany, Austria-Hungary, and Italy) faced internal issues.
- Escalating Tensions (1906-1911): Media campaigns, arms race, and crises in the Balkans and Morocco.
- Balkan Tensions: The Balkan Wars further destabilized the region.
- Naval Agreement: Russia and Great Britain’s naval agreement in 1914.
Key Constraints
- Territorial rivalries (Balkans, Straits).
- Clash of hegemonies: Triple Alliance vs. Triple Entente.
- Psychological and political factors, arms race, military planning.
- Economic competition and control of markets.
Trigger
Assassination in Sarajevo.
Development and Stages of the War
A month passed between the assassination and the start of the war. Great Britain initially hesitated but intervened after Germany attacked Belgium. The conflict began in Europe but spread globally, involving colonies. Japan declared war on Germany, seeking to control German archipelagos in the Pacific. Turkey and Bulgaria joined the Central Powers, while Romania, Italy, and Greece joined the Entente. The United States’ entry shifted the balance in favor of the Allies.
The Central Powers aimed for a quick victory, but the war lasted four years. The economic and human losses were significant. Women entered the workforce, colonial empires faced crises, and Japan and the U.S. emerged as new powers.
Stages of the War
- War of Movements:
- Western Front: German Schlieffen Plan aimed to attack Paris through Belgium. The Franco-British forces were defeated at Charleroi, but the German advance was halted at the Battle of the Marne.
- Eastern Front: Russian victory at Lemberg against Austria-Hungary, followed by defeats at Tannenberg and Masurian Lakes.
- Trench Warfare:
The war became static with trench warfare. Turkey, Bulgaria, and Italy entered the conflict. The Germans took the lead at the Battle of Verdun, and the Allies at the Battle of the Somme.
- Crucial Year:
- Western Front: Mutinies in French units led to Petain replacing Nivelle. Tensions rose in Germany and Austria-Hungary.
- Eastern Front: Crisis and the Russian Revolution. The Treaty of Brest-Litovsk posed a threat to the Allies.
- The entry of the U.S. and Greece opened the Balkan front, boosting Allied morale.
- End of War (1918):
The war began with an Austro-German victory, forcing the Bolsheviks to sign the Treaty of Brest-Litovsk. Finland became independent. The Germans launched the Second Battle of the Somme but were halted at the Marne. After the German retreat to Belgium, Wilhelm II abdicated, and an armistice was signed. Austria was defeated in the Alps, and Turkey and Bulgaria also surrendered.