World War I: Causes, Conflicts, and Global Impact

1. War and Revolution 1914-1923

Between 1871 and 1914, rivalries between European countries resulted in the formation of two powerful alliances that fought against one another during the First World War.

• Industrial advancements: Improvements in weapons and army logistics.
• Social change: Women entered the workforce in factories.
• Political upheaval: Russia’s participation led to the Russian Revolution.
• Neutrality and conflict: Spain remained neutral, while military conflict occurred in Africa.
• Cultural impact: The avant-garde movement greatly influenced art.

2. The First World War

2.1 Causes

• France sought to recover Alsace-Lorraine.
• The Austro-Hungarian Empire occupied Bosnia-Herzegovina (1878-1908).
• Industrialized European countries expanded their empires to control colonies in North Africa.
• Britain and Germany were involved in a naval arms race.

2.2 War Participants

2.3 Phases

• Initial German Offensives (1914): Rapid offensives invading Belgium and northern France to prevent Russian advances.
• Trench Warfare and New Allies (1915-1917): The Western Front between Germany and the Allies became a period of trench warfare. In 1917, the US entered the war to support the Allies, while Russia began to collapse.
• Allied Victories and the Armistice (1918): Russia withdrew from the war. Following Allied victories, Kaiser Wilhelm II abdicated and the armistice was signed in 1918.

3. Economy and Society During the War

Economy

Economic activity shifted to support the military effort, including the production of food, vehicles, uniforms, and weapons.

• Innovations: Telephone, telegraph, tanks, aeroplanes, submarines, grenades, machine guns, heavy artillery, and poison gas.
• Market conditions: Consumer goods decreased, prices increased, and black markets emerged.

Social Effects

As men were conscripted or recruited into the armed forces, women replaced them in economic activities. After the war, women wanted to continue working, but there were not enough jobs.

4. The Post-War Era

4.1 The Peace Settlement

Five treaties were signed by defeated countries. The Treaty of Versailles imposed strict terms on Germany:

• Prohibition of tanks and air forces.
• Requirement to pay reparations to the European Allies.
• Signing of the war-guilt clause.
• Return of Alsace-Lorraine to France and the division of East Prussia to create Poland.

Note: These terms caused significant resentment among the German population.

League of Nations

President Wilson proposed the establishment of the League of Nations, an international organization intended to guarantee peace and prevent future wars.

4.2 Consequences of the War

• Death and injury: Significant population decline.
• Material destruction: Massive losses of cities, factories, buildings, roads, and bridges.
• Economic decline: The US emerged as the global economic leader, displacing Europe.
• New European states: The German, Austro-Hungarian, Russian, and Ottoman Empires ceased to exist. New states included Poland, Austria, Hungary, Czechoslovakia, and Finland.
• Colonial changes: Allied Powers gained control over former colonies.