How did the failures of the peace, aggression, and appeasement lead to World War II?
Explain the causes of World War II: the unresolved tensions of World War I, the Great Depression, the aggression of Germany, Italy, and Japan, the failure of appeasement, and the weakness of the League of Nations (Framework Key Idea 10.8).
A Framework-level answer on the causes of World War II for the NY Global History and Geography II Regents: the unresolved tensions of World War I, the Great Depression, fascist and Japanese aggression, the failure of appeasement and the League of Nations, with worked exam questions.
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What this topic is asking
Framework Key Idea 10.8 covers the causes of World War II. It asks you to explain how the unresolved tensions of World War I, the Great Depression, the aggression of Germany, Italy, and Japan, the failure of appeasement, and the weakness of the League of Nations combined to produce the deadliest war in history. This is a major cause-and-effect topic, building directly on the consequences of World War I.
The unresolved tensions of World War I
The first cause reaches back to the end of the previous war. The Treaty of Versailles had punished Germany with blame, reparations, lost territory, and disarmament, leaving deep resentment. Many Germans wanted to overturn the treaty, and Hitler promised to do exactly that. World War II was in many ways the unfinished business of World War I.
The Great Depression and the rise of dictators
The Great Depression of the 1930s brought mass unemployment and despair that destroyed faith in democratic governments and helped bring Hitler to power in Germany, where he built an aggressive, militarized totalitarian state. Economic crisis and dictatorship were tightly linked.
Axis aggression
The failure of appeasement and the League of Nations
At the Munich Conference (1938), Britain and France allowed Hitler to annex the Sudetenland (part of Czechoslovakia), believing this would satisfy him. Instead, appeasement convinced Hitler the democracies would not fight, so he kept expanding. The League of Nations, created after World War I to keep the peace, was too weak to stop any of this: it had no army of its own, and key powers (including the United States) were not members, so its condemnations were ignored. When Germany invaded Poland on 1 September 1939, Britain and France finally declared war, and World War II began.
Try this
Q1. Name the 1938 conference at which Britain and France appeased Hitler by letting him take the Sudetenland. [Recall]
- Cue. The Munich Conference.
Q2. Explain why the League of Nations failed to prevent World War II. [Short explanation]
- Cue. The League had no army to enforce its decisions, and key powers such as the United States were not members, so aggressors like Germany, Italy, and Japan ignored its condemnations without consequence.
Exam-style practice questions
Practice questions written in the style of NYSED exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
Regents GHG II (stimulus, 2023)1 marksAt Munich in 1938, Britain and France allowed Hitler to annex part of Czechoslovakia in the hope of avoiding war. This policy is known as (1) containment; (2) appeasement; (3) collective security; (4) imperialism.Show worked answer →
A stimulus-based multiple-choice item assessing causation (Practice B).
The correct answer is (2). Appeasement was the policy of giving in to an aggressor's demands to avoid war; at the 1938 Munich Conference, Britain and France let Hitler take the Sudetenland, hoping he would stop.
Why the others are wrong: (1) containment was a later Cold War policy; (3) collective security is acting together against aggression, the opposite of appeasement; (4) imperialism is empire-building.
Markers reward identifying the Munich concession as appeasement.
Regents GHG II (CRQ cause-effect, 2024)2 marksDocument 1 describes Hitler repeatedly breaking the Treaty of Versailles while Britain and France did not act. Based on this document and your knowledge of social studies, explain how the policy of appeasement contributed to the outbreak of World War II.Show worked answer →
A 2-point Cause-and-Effect CRQ (Practice B).
A complete answer explains the link: by giving in to Hitler's demands (rearmament, the remilitarization of the Rhineland, the annexation of Austria, and the Sudetenland at Munich) without resistance, Britain and France allowed Germany to grow stronger and bolder. Appeasement convinced Hitler the democracies would not fight, so he kept expanding until he invaded Poland in 1939, finally triggering the war.
Markers reward connecting appeasement (concessions without resistance) to Hitler's growing aggression and the outbreak of war.
Related dot points
- Explain the rise of totalitarian regimes between the wars: how fascism in Italy, Nazism in Germany, and Stalinism in the Soviet Union used crisis, propaganda, repression, and state control to gain and hold power (Framework Key Idea 10.7).
A Framework-level answer on the rise of totalitarianism for the NY Global History and Geography II Regents: what totalitarianism is, and how Mussolini's fascism, Hitler's Nazism, and Stalin's communism used crisis, propaganda, terror, and total state control to seize and keep power, with worked exam questions.
- Explain the causes and global effects of the Great Depression: how the economic collapse of the 1930s spread through an interconnected world economy and created conditions for political extremism (Framework Key Idea 10.7).
A Framework-level answer on the Great Depression for the NY Global History and Geography II Regents: the causes of the 1930s collapse, how it spread through an interconnected world economy, its effects of mass unemployment and hardship, and how it created conditions for totalitarianism, with worked exam questions.
- Explain how World War I was fought (total war, new technology, trench warfare) and its consequences: massive casualties, the fall of empires, the Treaty of Versailles, and the conditions that led to future conflict (Framework Key Idea 10.6).
A Framework-level answer on how World War I was fought and its consequences for the NY Global History and Geography II Regents: total war and new technology, trench warfare, the collapse of empires, and the Treaty of Versailles, with worked exam questions.
- Explain the course and global scale of World War II and the Holocaust: the major fronts and turning points, the war's unprecedented destruction, and the systematic Nazi genocide of Jews and other targeted groups (Framework Key Idea 10.8).
A Framework-level answer on World War II and the Holocaust for the NY Global History and Geography II Regents: the global scale and major turning points of the war, its enormous human cost, the atomic bombs, and the systematic Nazi genocide of six million Jews and other groups, with worked exam questions.
- Explain the origins of the Cold War: how ideological and political differences between the United States and the Soviet Union after World War II created a global rivalry, including containment, the division of Europe, and the arms race (Framework Key Idea 10.9).
A Framework-level answer on the origins of the Cold War for the NY Global History and Geography II Regents: the ideological clash between capitalism and communism, the division of Europe and the Iron Curtain, containment and the Truman Doctrine, NATO and the Warsaw Pact, and the arms race, with worked exam questions.
Sources & how we know this
- New York State K-12 Social Studies Framework (Grades 9 to 12) — New York State Education Department (2016)
- Global History and Geography II Framework — New York State Education Department (2025)