Japan escalates its war in China, drawing increasing US sanctions and widespread outrage. Driven by resource shortages and military ideology, Japan attacks Pearl Harbor in a move that will reshape the course of World War II. 

The story of Operation Barbarossa, Adolf Hitler’s massive surprise invasion of the Soviet Union in 1941, the largest and costliest land offensive in human history.  

After toppling the Netherlands and Belgium, Nazi Germany pushes further west. The Allies scramble to support France as Churchill is forced to defend Britain from the skies and FDR rushes to mobilize wartime production. 

In September 1939, Germany invades Poland, setting the stage for the most destructive war in history.