The Outbreak of World War II: A Turning Point in History

What event triggered the declaration of war by Britain and France on Germany in World War II?

A. Germany formed an alliance with Japan

B. Germany annexed Austria

C. Germany became a fascist state

D. Germany invaded Poland

Answer: D

Britain and France declared war on Germany in World War II because Germany invaded Poland.

The invasion of Poland by Germany in September 1939 marked a turning point in the history of World War II. This aggressive act by Germany directly led to the official declarations of war by Britain and France on Germany. The invasion of Poland was a clear violation of international agreements and triggered an immediate response from the Allied powers.

At the time, the policy of appeasement, which was pursued by Britain and France towards Germany in the years leading up to the war, had failed to prevent Adolf Hitler from seeking further expansion of German territory. The invasion of Poland demonstrated Hitler's disregard for diplomatic norms and his readiness to use military force to achieve his expansionist goals.

By declaring war on Germany, Britain and France signaled their commitment to upholding their treaty obligations and defending the sovereignty of Poland. This marked the beginning of a new phase in the conflict, as the war expanded beyond Central Europe and became a truly global conflict involving numerous countries.

The events that followed the declaration of war on Germany in 1939 would shape the course of World War II and have lasting consequences for the world. The invasion of Poland by Germany served as a catalyst for the broader conflict and highlighted the dangers of aggression and militarism in the international arena.