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Study Guide: AP World History – World War II and the Holocaust (Fascism, Blitzkrieg, Atomic Bomb)
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AP World History – World War II and the Holocaust (Fascism, Blitzkrieg, Atomic Bomb)

By Fatskills Exam Guides Team — the exam nerds behind 28,500+ quizzes and 2.1M practice questions across 500+ global exams.

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AP World History – World War II and the Holocaust (Fascism, Blitzkrieg, Atomic Bomb)


What This Is

This topic covers World War II (1939–1945) and the Holocaust, focusing on fascism, military strategies (Blitzkrieg), and the atomic bomb. On the AP exam, you’ll need to explain causes, key events, and consequences of the war, as well as how ideologies like fascism led to genocide. Example: The Blitzkrieg ("lightning war") tactic—used by Nazi Germany to quickly overrun Poland in 1939—shows how military innovation and ideological aggression shaped the war’s early years.


Key Terms & Concepts

  • Fascism: A far-right, ultranationalist ideology that glorifies the state, suppresses dissent, and promotes militarism. Key features: dictatorship, censorship, scapegoating (e.g., Jews, communists), and expansionist wars. Example: Mussolini’s Italy (1922–1943) and Hitler’s Nazi Germany (1933–1945).
  • Appeasement: A policy of giving in to aggressive demands to avoid war. Example: Britain and France allowing Hitler to annex the Sudetenland (1938)—this failed to prevent WWII.
  • Blitzkrieg ("Lightning War"): A German military strategy using fast-moving tanks (Panzers), air strikes (Luftwaffe), and infantry to overwhelm enemies quickly. Example: Invasion of Poland (1939) and France (1940).
  • Holocaust: The Nazi genocide of 6 million Jews (and 5 million others, including Romani people, disabled individuals, and political prisoners) through concentration camps (e.g., Auschwitz), mass shootings, and gas chambers.
  • Total War: A war where entire societies mobilize—governments control economies, propaganda is widespread, and civilians are targeted. Example: Britain’s rationing, U.S. factory conversions to war production, and the firebombing of Dresden.
  • Island Hopping: The U.S. strategy in the Pacific to capture key islands while bypassing others to get closer to Japan. Example: Battle of Guadalcanal (1942–43).
  • Atomic Bomb: A nuclear weapon with unprecedented destructive power. The U.S. dropped two on Hiroshima (August 6, 1945) and Nagasaki (August 9, 1945), leading to Japan’s surrender.
  • United Nations (UN): An international organization founded in 1945 to prevent future wars (replacing the failed League of Nations). Example: Universal Declaration of Human Rights (1948).
  • Nuremberg Trials (1945–46): Post-war trials where Nazi leaders were prosecuted for war crimes, establishing the principle that individuals are responsible for atrocities.
  • Cold War Origins: WWII’s end led to U.S.-Soviet tensions over ideology (capitalism vs. communism) and control of Europe (e.g., Iron Curtain speech, 1946).

Step-by-Step: How to Analyze WWII & the Holocaust on the AP Exam

  1. Identify Causes (Long-Term & Short-Term)
  2. Long-term: Treaty of Versailles (1919) humiliated Germany-economic instability-rise of Hitler.
  3. Short-term: Hitler’s expansionist policies (e.g., annexing Austria, 1938; invading Poland, 1939).
  4. Example FRQ prompt: "Explain how the Treaty of Versailles contributed to the outbreak of WWII."

  5. Compare Military Strategies

  6. Germany: Blitzkrieg (speed + surprise).
  7. Allies: Total war (economic mobilization, e.g., U.S. Lend-Lease Act, 1941).
  8. Japan: Kamikaze attacks (suicide pilots) and bushido code (fighting to the death).

  9. Analyze the Holocaust (Causes & Methods)

  10. Causes: Nazi anti-Semitism, propaganda (e.g., "The Eternal Jew" film), and dehumanization of Jews.
  11. Methods: Ghettos (e.g., Warsaw Ghetto)-Einsatzgruppen (mobile killing squads)-death camps (e.g., Auschwitz).
  12. Example DBQ document: A Nazi propaganda poster or a survivor’s testimony.

  13. Evaluate Turning Points

  14. 1942–43: Stalingrad (Soviets defeat Germany)-El Alamein (Allies push back in North Africa)-Midway (U.S. cripples Japan’s navy).
  15. 1944: D-Day (Allied invasion of Normandy, June 6).

  16. Assess the Atomic Bomb’s Impact

  17. Immediate: Japan surrenders (August 15, 1945).
  18. Long-term: Nuclear arms race (Cold War), debates over morality of atomic warfare.

  19. Connect to Post-War World

  20. Decolonization: WWII weakened European powers (e.g., Britain grants India independence, 1947).
  21. Cold War: U.S. vs. USSR (e.g., Marshall Plan, 1948 vs. Soviet control of Eastern Europe).

Common Mistakes

  • Mistake: Saying WWII started in 1941 (Pearl Harbor).
  • Correction: The war began in 1939 when Germany invaded Poland (Britain/France declared war).

  • Mistake: Calling the Holocaust "just a Jewish tragedy."

  • Correction: The Nazis targeted Jews, Romani people, disabled individuals, LGBTQ+ people, political prisoners, and Slavs. The Holocaust was systematic genocide, not just anti-Semitism.

  • Mistake: Thinking appeasement was the only cause of WWII.

  • Correction: While appeasement failed, Hitler’s expansionist ideology, the Nazi-Soviet Pact (1939), and Japan’s invasion of China (1937) were also key causes.

  • Mistake: Confusing Blitzkrieg with trench warfare.

  • Correction: Blitzkrieg = speed + surprise (WWII); trench warfare = static, defensive (WWI).

  • Mistake: Assuming the U.S. entered WWII to stop the Holocaust.

  • Correction: The U.S. entered after Pearl Harbor (1941); the Holocaust was not the primary reason for Allied involvement.

AP Exam Insights

  • Multiple-Choice Traps:
  • Distinguishing between fascism and communism: Fascism = ultranationalist, anti-communist, dictatorial; communism = classless society, state-controlled economy.
  • Atomic bomb debates: The exam may ask about alternatives to dropping the bomb (e.g., blockade, invasion, or demonstration).

  • FRQ/DBQ Themes:

  • Causes of WWII (Treaty of Versailles, appeasement, fascism).
  • Impact of technology (Blitzkrieg, atomic bomb, radar).
  • Human rights violations (Holocaust, Japanese war crimes in Nanking).
  • Post-war consequences (Cold War, decolonization, UN).

  • Tricky Distinction:

  • Holocaust vs. other genocides: The Holocaust was industrialized (gas chambers, railroads) and state-sponsored (Nazi government policy).

Quick Check Questions

  1. Which of the following best explains why Britain and France followed a policy of appeasement toward Nazi Germany in the 1930s? a) They wanted to avoid another world war. b) They supported Hitler’s anti-communist policies. c) They believed Germany had been treated unfairly in the Treaty of Versailles. d) They were economically dependent on German trade. Answer: a) Appeasement was an attempt to prevent war after the devastation of WWI.

  2. The term "Blitzkrieg" refers to: a) A defensive military strategy used by the Allies. b) A German tactic combining air strikes, tanks, and infantry for rapid conquest. c) The British bombing campaign against German cities. d) The U.S. strategy of island hopping in the Pacific. Answer: b) Blitzkrieg = fast, coordinated attacks to overwhelm enemies.

  3. Short FRQ: "Explain how the Holocaust was a result of Nazi ideology."

  4. Key points to include:
    • Anti-Semitism (Jews as scapegoats for Germany’s problems).
    • Racial hierarchy (Aryans as "master race").
    • Propaganda (dehumanizing Jews in media).
    • Final Solution (systematic extermination).

Last-Minute Cram Sheet

  1. 1939: WWII begins (Germany invades Poland).
  2. 1941: Pearl Harbor (Dec. 7)-U.S. enters war.
  3. 1942–43: Stalingrad, El Alamein, Midway = turning points.
  4. 1944: D-Day (June 6) – Allied invasion of Normandy.
  5. 1945: Hiroshima (Aug. 6) & Nagasaki (Aug. 9)-Japan surrenders.
  6. Fascism = ultranationalism + dictatorship + militarism (Hitler, Mussolini).
  7. Blitzkrieg = tanks + planes + infantry for speed.
  8. Holocaust = 6 million Jews + 5 million others killed (camps, ghettos, Einsatzgruppen).
  9. WWII ends in 1945, but Cold War begins immediately (U.S. vs. USSR).
  10. Atomic bomb = moral debate (alternatives vs. quick end to war).