Germany, 1918-45 - Formation and challenges of the Weimar Republic, Treaty of Versailles′ impact, Stresemann′s policies, Hitler′s rise to power, Nazi control and governance, life in Nazi Germany. The United States, 1919-41 - Economic boom and Wall Street Crash, societal changes in the 1920s, Prohibition′s effects, Roosevelt′s New Deal policies and opposition, unemployment and Great Depression. The First World War, 1914-18 - Causes and pre-war events, reasons for war continuation, British Expeditionary Force′s effectiveness, Western Front stalemates, new military technologies, major battles like Verdun and Somme. The Gulf conflict, c.1970-2000 - Saddam Hussein′s rise and rule, Iran-Iraq War causes and consequences, Gulf War origins and outcomes, revolutions in Iraq, geopolitical importance of the region. Collapse of international peace by 1939 - Peace efforts and failures, Treaty of Versailles′ long-term effects, League of Nations′ weaknesses, Hitler′s foreign policy and military actions, policy of appeasement. League of Nations′ effectiveness - Organization and aims, successes and failures in the 1920s-30s, Great Depression′s impact, structural weaknesses, inevitability of failure.