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IB DP History Study Notes

21.15.5 Causes of the Second World War and European Conflict (1939–1941)

The Second World War, which reshaped the global order, was the result of a complex interplay of various factors. This period saw the rise and fall of alliances, pivotal battles, and significant political and ideological shifts.

Prelude to War: Political and Economic Factors (1939)

  • Rise of Totalitarian Regimes: The aggressive expansionist policies of totalitarian regimes in Germany, Italy, and Japan were crucial in precipitating the war.
    • Germany: Under Adolf Hitler, the Nazi regime sought to overturn the Treaty of Versailles, aiming for territorial expansion and the establishment of a greater German Reich.
    • Italy: Benito Mussolini's fascist regime aimed to recreate a Roman Empire-like state, leading to invasions in Africa and the Balkans.
    • Japan: The militaristic government in Japan aimed to dominate East Asia, resulting in aggressive actions against China and Pacific territories.
  • Economic Hardships and Nationalism: The Great Depression caused widespread economic distress, fuelling nationalism and militarism. Unemployment and economic instability made extremist ideologies more appealing.
  • Failures of the League of Nations: The League's inability to prevent conflicts and enforce its decisions contributed to a loss of faith in collective security, emboldening aggressive states.

The Road to War: Key Events and Policies

  • German Expansion: Key milestones included the remilitarisation of the Rhineland (1936), the Anschluss with Austria (1938), and the Munich Agreement (1938), leading to the annexation of Sudetenland and later the rest of Czechoslovakia (1939).
  • Appeasement Policy: Britain and France's policy of making concessions to Hitler, epitomised by the Munich Agreement, aimed to avoid war but ultimately emboldened Nazi aggression.
  • Nazi-Soviet Pact (1939): The non-aggression pact between Germany and the Soviet Union allowed Germany to invade Poland without fear of Soviet intervention, leading Britain and France to declare war on Germany.

The War in Europe: Major Developments (1939–1941)

  • Blitzkrieg Tactics: Germany's strategy of rapid, combined arms warfare led to quick victories in Poland (1939), Denmark and Norway (1940), and the stunning fall of France in June 1940.
  • Battle of Britain (1940): This air battle marked the first major defeat of Hitler’s military forces, with the British Royal Air Force thwarting Germany's plans to invade Britain.
  • Operation Barbarossa (1941): Germany's invasion of the Soviet Union marked a significant escalation of the war, opening up the Eastern Front, leading to some of the largest and most brutal battles in history.

Formation and Dynamics of Wartime Alliances (1941–1945)

  • Allied Powers: Initially formed by the United Kingdom and France, later joined by the Soviet Union (after Operation Barbarossa) and the United States (after the attack on Pearl Harbor in December 1941).
  • Axis Powers: The alliance primarily consisted of Germany, Italy, and Japan, joined by other countries such as Hungary, Romania, and Bulgaria.
  • Shifting Alliances: The war witnessed shifts in alliances, notably Italy switching sides in 1943 after Mussolini's fall and the subsequent Allied invasion.

Axis Defeat and Allied Victory: Key Factors (1945)

  • Economic and Industrial Capacity: The Allies, particularly the USA and USSR, outproduced the Axis in terms of war material, a critical factor in their eventual victory.
  • Strategic Military Decisions: Decisive battles, including Stalingrad (1942–1943) and Normandy (D-Day, 1944), marked turning points in the war, depleting Axis resources and morale.
  • Home Front and Civilian Mobilisation: The total war effort saw extensive civilian involvement in industrial production, rationing, and support services, crucial for sustaining military campaigns.
  • Technological Superiority: The Allies benefited from superior technology, including advancements in radar, cryptography (breaking of the Enigma code), and, ultimately, the development of atomic weapons.

Social and Humanitarian Impact

  • Civilian Suffering: The war brought unprecedented suffering to civilian populations, with widespread bombings, sieges, and forced relocations.
  • The Holocaust: The systematic genocide perpetrated by Nazi Germany targeted Jews, Romani people, disabled individuals, and other groups, resulting in the deaths of six million Jews and millions of others.
  • Resistance Movements: Occupied countries witnessed the emergence of resistance movements, which played a significant role in gathering intelligence and sabotaging Axis efforts.

This detailed analysis of the causes, developments, and outcomes of the Second World War, particularly focusing on European conflict, provides a comprehensive understanding of this tumultuous period. The war's causes were rooted in political ambitions, economic crises, and ideological conflicts, while its course was shaped by military strategies, economic resources, and the resilience of nations and their people. The outcome of the war significantly altered the global landscape, setting the stage for the Cold War and the modern world order. Understanding these factors is crucial for comprehending the complexities of global conflicts and their profound impact on history and humanity.

FAQ

The United States' entry into the Second World War, following the Japanese attack on Pearl Harbor in December 1941, significantly altered the dynamics of the conflict. As an industrial powerhouse, the U.S. provided enormous resources in terms of weaponry, supplies, and financial aid (through programmes like the Lend-Lease Act) to the Allied powers. American military involvement brought fresh troops and advanced technology, notably in the fields of aviation and naval warfare, which were crucial in both European and Pacific theatres. Furthermore, the U.S. entry into the war symbolised the collapse of isolationist policies, uniting a larger front against the Axis Powers and contributing significantly to their eventual defeat.

The Eastern Front in the Second World War, characterised by the conflict between Nazi Germany and the Soviet Union, was markedly different from the Western Front in both the nature of warfare and its impact. The Eastern Front was the site of some of the largest and most brutal battles in history, such as Stalingrad and Kursk, involving massive armies and resulting in high casualties. Warfare here was characterised by its sheer scale, brutal weather conditions, and the ideological ferocity of both sides. The Eastern Front drained Nazi resources significantly, with the harsh Russian winter and the tenacity of the Soviet resistance playing pivotal roles. The enormity of the Eastern Front and the significant losses incurred by the Nazis were major factors in weakening the Axis Powers and contributed to their eventual defeat.

The Battle of Britain, fought in the skies over the UK in 1940, was a significant turning point in the Second World War. It was the first major campaign to be fought entirely by air forces, and the first major defeat for Hitler's military machine. The battle was crucial in preventing Germany from achieving air superiority, a prerequisite for the planned invasion of Britain (Operation Sea Lion). The resilience of the Royal Air Force, coupled with effective use of radar technology and British code-breaking efforts, not only foiled German plans but also served as a morale booster for the Allies. It marked the point where the tide began to turn against the Axis powers in Western Europe.

The appeasement policy adopted by Britain and France, particularly in the lead-up to the Second World War, involved making concessions to Germany in hopes of avoiding conflict. This policy was notably evident in the Munich Agreement of 1938, where these powers allowed Germany to annex the Sudetenland from Czechoslovakia without Czech participation in the negotiations. This approach was rooted in the desire to prevent another devastating war and the belief that Hitler's territorial demands were limited. However, appeasement emboldened Hitler, demonstrating to him that aggression would be met with negotiation rather than opposition. It inadvertently encouraged further expansionist moves by Germany, undermining collective security and leading directly to the war.

Italy, under Mussolini, joined the Axis Powers due to shared ideological beliefs with Nazi Germany, particularly fascism, and mutual interests in territorial expansion. Mussolini sought to establish Italy as a dominant power in the Mediterranean and Africa, aligning with Germany seemed a strategic move to achieve these ambitions. However, Italy's involvement in the war had mixed impacts. Italian military campaigns, notably in Greece and North Africa, were less successful and often required German support. This diversion of German resources to assist Italy, particularly in North Africa and the Balkans, strained German military efforts and stretched their forces across multiple fronts, contributing to the Axis Powers' eventual defeat.

Practice Questions

Evaluate the impact of the Nazi-Soviet Pact on the development of the Second World War.

The Nazi-Soviet Pact, signed in 1939, had a profound impact on the development of the Second World War. It not only surprised the international community but also altered the strategic landscape of Europe. The pact allowed Hitler to invade Poland without fearing Soviet intervention, directly leading to Britain and France declaring war on Germany. This agreement showcased the pragmatic, yet opportunistic foreign policies of both Nazi Germany and the Soviet Union. Additionally, it delayed the inevitable clash between these two powers, which, when it occurred in 1941, opened up the catastrophic Eastern Front and significantly weakened Nazi resources and focus.

Discuss the role of technological advancements in the Allied victory in the Second World War.

Technological advancements played a crucial role in the Allied victory in the Second World War. The development and use of radar technology were pivotal in the Battle of Britain, enabling the Royal Air Force to effectively counter German air attacks. Additionally, the breaking of the Enigma code by Allied cryptographers provided vital intelligence, significantly aiding in military planning and operations. The Allies also benefited from superior logistical capabilities, exemplified by the efficient mass production of war materials. The culmination of these technological advancements was the development of the atomic bomb, which, though used post-European conflict, underscored the technological superiority of the Allies.

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