On September 1, 1939 Germany invaded Poland. On September 3 Britain and France, Poland's allies, declared war on Germany. World War Two had begun. The war in Europe would last until the spring of 1945 and would engulf all of Europe and be fought across the globe. The sections for World War Two are as follows.
Section 24.1 The Origins of World War Two in Europe
Section 24.2 World War Two: A Narrative Chronology
Section 24.3 The Holocaust
Section 24.4 Allied Cooperation and the Making of the Peace
Section 24.5 The United Nations
World War Two in Asia and the Pacific is not part of this consideration of the war.