On September 3, 1939, the world stood at a pivotal crossroads as Europe faced the looming specter of war.

Nazi Germany's invasion of Poland on September 1st had shaken the foundations of international diplomacy, and the global community was forced to confront a critical decision:

would they stand idly by, or would they rise to the challenge of confronting the aggressor?

  Ultimately, it was the United Kingdom and France who answered the call to action.

In a move that would forever shape the course of history, these two powerhouses of Europe declared war on Germany, setting in motion a chain of events that would lead to the Second World War. - https://germanyfocusguide.com/blog/europe-declare-war-germany-ww2/?unique_id_137w3mxr

"The Fateful Decision: How Europe's Declaration of War on Germany Altered the Course of World War II