1) The document provides background information on World War II, including that 50 million people died total and the war cost the US $330 billion, over 10 times the cost of WWI.
2) It describes the major Allied and Axis powers, leaders like Hitler and Roosevelt, and the isolationist policies in the US prior to entering the war in 1941.
3) The underlying causes that led to WWII included the Treaty of Versailles, the worldwide depression, the rise of totalitarian regimes like Nazi Germany, and the policy of appeasement towards Hitler by other nations.