Final answer:
The Expansion of the military, Militarism, Alliances, and Nationalism were key factors contributing to the start of World War 1.
Step-by-step explanation:
Causes of World War 1
- Militarism: The belief in building up military forces as a show of strength and power. In the years leading up to World War 1, countries like Germany and Britain engaged in an arms race, stockpiling weapons and increasing the size of their armies.
- Alliances: As tensions grew between countries, they formed alliances to protect themselves. The two major alliances in Europe before the war were the Triple Entente (France, Britain, and Russia) and the Central Powers (Germany, Austria-Hungary, and Italy).
- Nationalism: A strong feeling of loyalty and pride towards one's own nation. In the early 20th century, there was a rise in nationalism in Europe, particularly in countries like Serbia. Nationalism led to conflicts between ethnic groups and competition for power and territory.
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