World History: 1200 to the Present · Module 8 of 16
The Origins of World War I
The long-building tensions and the single spark that turned Europe into a battlefield.
Long-Term Causes: MAIN
- Historians often summarize WWI's long-term causes with the acronym MAIN: Militarism (arms race), Alliances (entangling treaty systems), Imperialism (colonial competition), and Nationalism (ethnic tensions, especially in the Balkans).
What does the acronym MAIN stand for in explaining the causes of WWI?
Solution. Militarism, Alliances, Imperialism, and Nationalism — the four long-term causes historians often cite.
The Alliance System
- Europe was divided into two major alliance blocs before WWI: the Triple Alliance (Germany, Austria-Hungary, Italy) and the Triple Entente (France, Russia, Britain).
- These alliances meant a conflict between any two countries could quickly draw in all the other allied nations.
Why did the alliance system make a small, localized conflict likely to become a much larger war?
Solution. Because alliance treaties obligated countries to defend their allies, a conflict between just two nations could trigger a chain reaction pulling in all the other allied powers.
The Assassination & the July Crisis
- The assassination of Archduke Franz Ferdinand of Austria-Hungary by Gavrilo Princip in Sarajevo (June 28, 1914) was the immediate spark that triggered the war.
- This event set off the "July Crisis," a month of ultimatums and mobilizations that escalated into a continent-wide war by early August 1914.
What event directly triggered the start of World War I?
Solution. The assassination of Archduke Franz Ferdinand of Austria-Hungary by Gavrilo Princip in Sarajevo on June 28, 1914.
Total War & New Technology
- WWI became a "total war," mobilizing entire national economies and populations, including women in factories, to support the war effort.
- New military technology — machine guns, poison gas, tanks, and trench warfare — made the war extraordinarily deadly and largely a grinding stalemate on the Western Front.
Why did new technology like the machine gun make WWI so much deadlier than earlier wars?
Solution. Machine guns could fire rapidly and continuously, making traditional infantry charges across open ground extremely deadly, which contributed to the grinding trench warfare stalemate on the Western Front.
Check yourself
2 of this module's 5 quiz questions. Pick your answers, then check them in the app, with an explanation for every question.
1. What does the "A" in MAIN stand for?
2. Which two alliance blocs divided Europe before WWI?