January 1943 - December 1943: Americans mobilize for total war at home and overseas. Factories hum around the clock, while in North Africa and then Italy, inexperienced GIs learn how to fight. Meanwhile, in the skies over Europe, thousands of American airmen gamble their lives against preposterous odds on daylight bombing missions.

June 1944 - August 1944: On June 6, 1944, D-Day, 1.5 million Allied troops take part in the greatest invasion in history, but then bog down in the Norman hedgerows for weeks. Saipan proves the costliest Pacific battle to date, while back home dreaded telegrams from the War Department begin arriving at an inconceivable rate.

March 1945 - December 1945: A few weeks after the death of President Roosevelt shocks the country, Germany surrenders. Meanwhile, American sailors, soldiers and Marines endure the worst battle of the Pacific - Okinawa. In August, American planes drop atomic bombs on Hiroshima and Nagasaki, and the Japanese, too, surrender. Millions return home - to try to learn how to live in a world without war.