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Updated Mar 17, 2026

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3 pages

The Key Causes of World War 1

Maddi Howden

@maddihowden_bhds

World War One didn't start overnight - it was caused... Show more

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What was the main cause of ww12.
M-militarisM
A alliances
1 imperialism
N-nationalism

A
Triple alliance
Germany
Triple entente
Great Britai

The Spark That Started It All

The assassination of Archduke Franz Ferdinand by Gavrilo Princip in 1914 was the immediate trigger for World War One, but the real causes run much deeper. Princip, leader of the Black Hand Gang, was a Serbian nationalist who shot Franz and his pregnant wife Sophie after a chance encounter outside a sandwich shop in Sarajevo.

What made this assassination so deadly wasn't just the act itself, but the alliance system that was already in place across Europe. The Triple Alliance $Germany, Austria-Hungary, and Italy$ faced off against the Triple Entente (Britain, France, and Russia), creating two massive opposing sides.

When Austria-Hungary declared war on Serbia over the assassination, these alliances kicked into action like dominoes falling. Russia defended Serbia, Germany backed Austria-Hungary, and France and Britain joined to support Russia.

Remember: Franz Ferdinand's relaxed attitude towards security made him an easy target - he didn't like having lots of guards around him!

How Alliances and Nationalism Fueled the Fire

The alliance system transformed what could have been a small conflict between Serbia and Austria-Hungary into a massive European war. These alliances didn't just bring more countries into the fight - they actually encouraged nations to seek conflict rather than peaceful solutions because they knew they had backup.

Nationalism played a huge role in making war seem attractive to ordinary people across Europe. There was a massive focus on proving which country was the "best," and many believed that winning a war would demonstrate their nation's superiority.

This nationalist fever worked hand-in-hand with militarism. The growing acceptance of conflict and the desire to show off military strength made governments more likely to choose fighting over negotiating. Public opinion strongly supported the idea of war, which made it easier for leaders to pursue aggressive policies.

Key Point: Nationalism was arguably more important than alliances because public support could sway government decisions towards war.

Militarism and Imperialism: The Arms Race Heats Up

Militarism created the perfect conditions for war through a massive arms race between European powers. Germany built up an army of 2.2 million soldiers, while Britain maintained the world's largest navy, leading to intense competition over who had the most impressive military.

Imperialism added another layer of tension as European nations competed for colonies and global influence. Britain worried about Germany's growing empire, while Austria-Hungary expanded their territory by annexing Bosnia in 1912 - a move that directly angered Serbian nationalists like Gavrilo Princip.

These four causes - militarism, alliances, imperialism, and nationalism - created a powder keg across Europe. All it needed was a spark, and Franz Ferdinand's assassination provided exactly that.

Exam Tip: Remember MAIN as your acronym - it's the perfect way to structure any essay question about the causes of World War One!

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650

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Updated Mar 17, 2026

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3 pages

The Key Causes of World War 1

Maddi Howden

@maddihowden_bhds

World War One didn't start overnight - it was caused by a perfect storm of tensions that had been building across Europe for years. Understanding these causes through the handy acronym MAINwill help you grasp how a single assassination... Show more

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The Spark That Started It All

Remember: Franz Ferdinand's relaxed attitude towards security made him an easy target - he didn't like having lots of guards around him!

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How Alliances and Nationalism Fueled the Fire

Key Point: Nationalism was arguably more important than alliances because public support could sway government decisions towards war.

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Militarism and Imperialism: The Arms Race Heats Up

These four causes - militarism, alliances, imperialism, and nationalism - created a powder keg across Europe. All it needed was a spark, and Franz Ferdinand's assassination provided exactly that.

Exam Tip: Remember MAIN as your acronym - it's the perfect way to structure any essay question about the causes of World War One!