Causes of World War Two, Explained
World War Two (1939–1945) was the deadliest conflict in history. Like most big events, it had several connected causes rather than one. Understanding how they link together is the key to answering exam questions well.
The Treaty of Versailles
The treaty that ended World War One punished Germany harshly — huge reparations, lost territory, and a limited army. Many Germans felt humiliated and resentful, which extremist politicians later used to gain support.
Economic depression and the rise of dictators
The Great Depression of the 1930s caused mass unemployment and desperation. In this climate, dictators promising strength and recovery rose to power — most importantly Adolf Hitler in Germany. Aggressive, expansionist regimes also took hold in Italy and Japan.
Appeasement and the final trigger
Britain and France initially tried to avoid war by giving in to some of Hitler’s demands — a policy called appeasement. It failed to stop him. When Germany invaded Poland in September 1939, Britain and France finally declared war.
Frequently asked questions
What event started World War Two?
Germany’s invasion of Poland in September 1939, which led Britain and France to declare war.
What was appeasement?
A policy of giving in to some of Hitler’s demands in the hope of avoiding war. It ultimately failed.
How did the Treaty of Versailles contribute?
Its harsh terms left Germany resentful and unstable, which extremist leaders exploited.