World War 2 By jaylah.hc Sep 1, 1939 The invasion of poland the primary catalyst for World War II, triggering declarations of war by Britain and France against Germany on September 3 Sep 3, 1939 great Britain and France declare war on Nazi Germany marking the official start of World War II in Europe
the primary catalyst for World War II, triggering declarations of war by Britain and France against Germany on September 3
marking the official start of World War II in Europe