The document provides a detailed overview of key events from 1919-1945, including the rise of isolationism in the US after WWI, the rise of dictators like Hitler in Germany and Mussolini in Italy, Japan's imperialism in Asia, major battles of WWII in both Europe and the Pacific, and the consequences of WWII including the development and use of atomic bombs against Japan. Key turning points discussed include Pearl Harbor bringing the US into the war, the Battle of Stalingrad stopping Germany's advance, D-Day in 1944, and the atomic bombings of Hiroshima and Nagasaki in 1945 that led to Japan's surrender.