World War I: Causes, Key Concepts & Early Battles

TL;DR

World War I was triggered by a series of underlying tensions and one immediate event, quickly involving many nations due to complex alliances. Early battles like Mons showed the devastating impact of new technologies and trench warfare. The war eventually became "total war," changing economies and societies.

1. The Mental Model

Think of WWI as a massive, complicated domino effect. Many small, interconnected factors built up pressure, which then toppled all at once with a single, immediate trigger that pulled everyone into a global conflict.

2. The Core Material

Causes of World War I

WWI didn't happen overnight; it was the result of long-term tensions and one "immediate cause." These are often remembered using the acronym "MAIN":

• Militarism: This was a build-up of military strength and a belief that military power was the best way to solve international problems. Countries were preparing for war.
• Alliances: European countries formed complex defense agreements, meaning an attack on one country could drag many others into conflict.
• Imperialism: Nations competed for colonies and resources around the world, leading to rivalries and conflicts over territory and influence.
• Nationalism: Intense pride in one's own country, often accompanied by a desire for self-rule or dominance over other groups, fueled ethnic tensions and rivalries.
• Immediate cause: While not specified in your notes, the immediate cause that sparked the war was the assassination of Archduke Franz Ferdinand of Austria-Hungary in June 1914.

Early Battles & Strategy

The war started with quick movements but soon bogged down.

• Schlieffen Plan: This was Germany's war plan to quickly defeat France by invading through neutral Belgium before Russia could fully mobilize. The plan's execution, specifically the invasion of Belgium, led Britain to declare war on Germany.
• Battle of Mons: This was one of the first major British battles of WWI. It was an early WWI battle where British forces engaged the advancing German army.

Why WWI Battles Were So Bloody & Trench Conditions

The combination of new technology and old tactics led to incredibly high casualties and a brutal style of warfare.

• Machine guns and artillery: These powerful new weapons caused immense destruction and made frontal assaults extremely costly.
• Trench warfare stalemate: Both sides dug