World War II, exploring its causes, major events, and consequences. The first source outlines the key factors that led to the war, such as the Treaty of Versailles, the rise of fascism, economic instability, and the policy of appeasement. It then recounts significant events like the Blitzkrieg, the Battle of Britain, the invasion of the Soviet Union, Pearl Harbor, and key battles like Stalingrad and D-Day Deep Dive with Mr AI and MS AI