Which Event Led Britain to Declare War on Germany?

Germany's Invasion of Poland

Germany's invasion of Poland was the event that led Britain to declare war on Germany. On September 1, 1939, German forces invaded Poland, marking the beginning of World War II. The invasion was a violation of international law and agreements, leading to widespread condemnation from the international community, including Britain.

Britain's Declaration of War

Following Germany's invasion of Poland, Britain issued an ultimatum to Germany, demanding the withdrawal of German forces from Poland. When Germany failed to comply with the ultimatum, Britain declared war on Germany on September 3, 1939. This marked the beginning of Britain's involvement in World War II.

Significance of the Invasion

The invasion of Poland by Germany was a turning point in history, leading to widespread conflict and devastation across Europe. The actions of Germany in launching this invasion ultimately resulted in a global war that would last for several years and have far-reaching consequences for the world.