World War II

The Second World War was a global conflict that lasted from 1939 to 1945 and involved most of the world's nations, organised into the Allied and Axis powers. It grew out of unresolved tensions following the First World War and the expansionist policies of Nazi Germany under Adolf Hitler, alongside the ambitions of Italy and Japan. It became the deadliest war in history, marked by mass mobilisation, industrialised warfare and immense civilian casualties.

The war was fought across many theatres, including Western and Eastern Europe, the Mediterranean, North Africa, the Atlantic and the Pacific. It also involved smaller but strategically important fronts, such as the fighting between Finland and the Soviet Union. Technology and intelligence played decisive roles: the breaking of German cipher traffic encoded by the Enigma machine, achieved largely at Britain's Bletchley Park, gave the Allies valuable insight into enemy plans and is regarded as a significant factor in the outcome.

The conflict in Europe ended with Germany's surrender in May 1945. The war in the Pacific continued until the atomic bombings of Hiroshima and Nagasaki and the Soviet entry against Japan led to Japan's surrender in September 1945. The war reshaped global politics, contributed to the emergence of the United States and the Soviet Union as superpowers, and set the stage for the Cold War, symbolised later by divisions such as the Berlin Wall.

Frequently asked questions

Who fought in World War II?

The main opposing sides were the Allies, including Britain, the Soviet Union, the United States and others, and the Axis powers led by Germany, Italy and Japan.

What was the Enigma machine?

It was a German cipher device used to encrypt military communications. Allied codebreakers, notably at Bletchley Park, succeeded in reading much of this traffic.

How did World War II end?

Germany surrendered in May 1945. Japan surrendered in September 1945 following the atomic bombings of Hiroshima and Nagasaki and the Soviet declaration of war.