In 1939, which event is widely considered the starting point of World War II?

In 1939, which event is widely considered the starting point of World War II?

• A. Germany's invasion of Czechoslovakia
• B. Germany's invasion of Poland on September 1, 1939
• C. Germany's invasion of Denmark
• D. Germany's invasion of France

Answer: (B)

The key idea is identifying the event that directly drew the major powers into war and started World War II in Europe. Germany’s invasion of Poland on September 1, 1939 is widely seen as the start because it led Britain and France to declare war on Germany a couple of days later, triggering a broader conflict. Earlier actions, like the takeover of Czech lands, were significant but did not immediately provoke full war declarations by Britain and France. The later invasions of Denmark and France occurred after the war had already begun, as part of its expansion. So the invasion of Poland best explains why the war is considered to have begun.

The key idea is identifying the event that directly drew the major powers into war and started World War II in Europe. Germany’s invasion of Poland on September 1, 1939 is widely seen as the start because it led Britain and France to declare war on Germany a couple of days later, triggering a broader conflict. Earlier actions, like the takeover of Czech lands, were significant but did not immediately provoke full war declarations by Britain and France. The later invasions of Denmark and France occurred after the war had already begun, as part of its expansion. So the invasion of Poland best explains why the war is considered to have begun.