Conflict in Europe 1935–1945: Core Summary

Causes of the Conflict

• Collapse of collective security: The League of Nations proved ineffective in addressing acts of aggression throughout the 1930s. The invasion of Abyssinia by Italy in $1935$, the Japanese invasion of Manchuria in $1931$, and the Spanish Civil War (beginning in $1936$) demonstrated the League's lack of enforcement power, as it failed to take decisive action or impose meaningful sanctions, undermining its credibility.

• Policy of appeasement (Britain & France): A strategy of making concessions to aggressive powers in the hope of avoiding war. Key instances include the remilitarisation of the Rhineland in $1936$ (a violation of Versailles), the annexation of Austria (Anschluss) in $1938$, and the Munich Agreement of $1938$ which allowed Germany to annex the Sudetenland region of Czechoslovakia. These actions, driven by a desire to avoid another major war and miscalculation of Hitler's true intentions, emboldened German expansion.

• Nazi–Soviet Non-Aggression Pact $ext{Aug 1939}$: A surprising agreement between sworn ideological enemies, which secretly partitioned Poland and removed any immediate threat of a two-front war for Germany, thereby removing the eastern check on Hitler's ambitions and clearing the way for the invasion of Poland.

• German foreign-policy aims: Driven by Hitler's extreme ideology, these included: revision of the Treaty of Versailles (seen as a humiliating diktat, particularly regarding territorial losses and reparations); Anschluss (unification with Austria); Lebensraum in the East (seeking 'living space' for ethnic Germans through expansion into Eastern Europe, primarily at the expense of Slavic populations); autarky (economic self-sufficiency to support a large military); and the destruction of communism (a core ideological goal).

Allied & Axis Aims / Strategies

• Axis: Primarily focused on rapid expansion and securing resources. Blitzkrieg (lightning war) was the core military strategy, involving swift, concentrated attacks using tanks, motorised infantry, and air support to break through enemy lines and avoid static trench warfare. Key aims included securing vital resources like oil (from the Caucasus and Southeast Asia) and food supplies to fuel their war machines and populations. Germany aimed to create a vast racial empire (Lebensraum) across Eastern Europe, while Japan sought to establish the Greater East Asia Co-Prosperity Sphere, dominating Asia's resources and markets.

• Allies: Focused on resisting totalitarian aggression and restoring international order. Their aims included safeguarding critical sea lanes (such as the Suez Canal and Atlantic shipping routes) vital for supply transport, and upholding the principle of self-determination, often articulated through documents like the Atlantic Charter.

• Strategic priorities: USSR's initial priority was survival against the German invasion, followed by a relentless counter-offensive to push back the invaders. Britain, facing immediate threats from air attacks and naval blockades, prioritised air and naval defence to secure its homeland and supply lines. The USA adopted a "Germany First" strategy after Pearl Harbor, believing Germany posed the most significant long-term threat to global stability, while simultaneously engaging Japan in the Pacific.

Major Turning Points (Europe)

• Blitzkrieg victories $1939–40$: Germany's rapid successes in Poland (September $1939$), the Low Countries (May $1940$), and France (June $1940$) showcased the devastating effectiveness of Blitzkrieg, leading to swift capitulation of these nations.

• Battle of Britain $1940$: The first major German defeat of the war, fought primarily in the air. The Royal Air Force (RAF), aided by radar technology, successfully defended British airspace against the Luftwaffe, denying Germany the air superiority necessary for a planned invasion (Operation Sea Lion).

• Operation Barbarossa $Jun 1941$ → Battle of Moscow $Dec 1941$: Germany's massive invasion of the Soviet Union marked a critical turning point. Despite initial deep advances, the Blitzkrieg strategy failed to achieve its objectives due to vast distances, severe logistical challenges, fierce Soviet resistance, and the brutal Russian winter, culminating in the German defeat at the gates of Moscow.

• El Alamein $Oct–Nov 1942$: A decisive British victory in North Africa, which pushed the Axis forces (led by Rommel) out of Egypt and secured the vital Suez Canal. This battle, along with Operation Torch (Allied landings in North Africa), turned the tide in the North African campaign.

• Stalingrad $Aug 1942–Feb 1943$ & Kursk $Jul 1943$: These monumental battles on the Eastern Front marked the definitive loss of German strategic initiative. Stalingrad, a brutal urban siege, resulted in the encirclement and destruction of the German Sixth Army. Kursk, the largest tank battle in history, was a final, failed German offensive to regain initiative, after which the Red Army maintained the offensive for the rest of the war.

• Allied air war $1940–45$: The sustained strategic bombing campaigns by the RAF and USAAF increasingly crippled German industry (e.g., oil, transportation, armaments) and severely impacted civilian morale, especially in cities like Hamburg and Dresden, though estimates of its material effectiveness vary.

• D-Day / Normandy $6 Jun 1944$: The largest amphibious invasion in history, opening a crucial Western Front in Europe. This massive Allied operation led to the liberation of Paris in August $1944$ and put immense pressure on German forces, forcing them to fight a two-front war.

• Soviet Operation Bagration $Jun–Aug 1944$: A massive Soviet offensive that completely destroyed German Army Group Centre, driving deeply into Poland and effectively annihilating a significant portion of the German forces on the Eastern Front, accelerating the Soviet advance towards Germany.

Impact on Civilians

• Britain: Civilians endured the Blitz (intensive German bombing campaigns), strict rationing of food and other necessities, and the evacuation of approximately $1.5$ million children from urban areas. Around $62{}000$ civilians were killed, and the population showed remarkable resilience and determination.

• Germany: Suffered extensively from Allied bombing campaigns, especially in cities like Hamburg (Operation Gomorrah) and Dresden. Despite late implementation of "total war" measures, the population faced increasing shortages of food and consumer goods as the war progressed. Over $400{}000$ German civilians died due to bombing and other war-related causes.

• USSR: Endured immense suffering and loss, including prolonged siege warfare (e.g., Leningrad, which lasted 900 days), devastating scorched-earth retreats by both sides, and mass dislocation of populations. The Soviet Union experienced an unparalleled human toll, with an estimated $ext{25 million}$ total deaths (including military personnel), representing the largest loss of life of any nation in the war.

• Women: All major belligerent states saw women take on expanded industrial and agricultural roles to replace men serving in the armed forces. In Britain and the USA, women became crucial in munitions factories, agriculture (e.g., Women's Land Army), and various auxiliary services. In Germany, initial Nazi ideology discouraged women from working outside the home, but increasing manpower shortages forced their mobilisation into the workforce from $1943$ onwards.

Holocaust in Occupied Europe

• Escalation: The systematic persecution and extermination of Jews by Nazi Germany escalated gradually: beginning with boycotts of Jewish businesses and the discriminatory Nuremberg Laws ($1933–35$); progressing to forced segregation into ghettos ($1939–41$) in occupied Eastern Europe where starvation and disease were rife; then to massacres conducted by mobile killing squads (Einsatzgruppen) in occupied Soviet territories ($1941$); and culminating in the "Final Solution" from $1942$ onwards, involving the construction and operation of industrialised death camps (such as Auschwitz-Birkenau, Treblinka, Sobibor, Chelmno, Belzec, and Majdanek) designed for mass murder, primarily through gassing.

• Approx. $6{}000{}000$ Jews murdered: This figure represents about two-thirds of the Jewish population of Europe at the time. Other victims included Roma (Gypsies), Serbs, disabled people, Soviet prisoners of war (POWs), political opponents, homosexuals, and social "asocials" targeted for extermination or persecution by the Nazi regime.

• Collaboration/Resistance varied: The response of occupied populations and governments ranged widely. Vichy France actively aided in the round-ups and deportation of Jews. In contrast, Bulgaria notably resisted deportations of its Jewish citizens, demonstrating that resistance, though dangerous, was possible in some contexts.

Reasons for Allied Victory

• Economic superiority: The Allied powers, particularly the United States and the Soviet Union, possessed vastly superior industrial output. The US became the "arsenal of democracy," producing vast quantities of weapons, vehicles, and supplies. The secure access to oil and food supplies (e.g., Soviet oil fields, Lend-Lease aid) ensured their war efforts were sustainable.

• Air & sea control: The Battle of the Atlantic was won by the Allies in $1943$ through convoy systems, technological advances (e.g., sonar, radar), and code-breaking (Ultra), ensuring vital transatlantic supply lines remained open. Strategic bombing campaigns significantly crippled German production capacities, reducing their ability to wage war.

• Multi-front pressure: Germany was forced to fight a continuous two-front war (and often more, including North Africa and Italy), dividing its resources between the vast Eastern Front against the USSR and the Western/Mediterranean Fronts against the Western Allies. This continuously stretched the Wehrmacht and exhausted its manpower and equipment.

• Intelligence & technology: Allied intelligence breakthroughs, particularly the deciphering of German Enigma codes (Ultra) and later Japanese codes (Magic), provided crucial insights into enemy plans and movements. Technological innovations like radar (critical in the Battle of Britain), jet engines (though more impactful post-war), and logistics innovations like Mulberry harbours (prefabricated artificial ports for D-Day) and the PLUTO pipeline (supplying fuel to Allied forces in France) significantly enhanced Allied military effectiveness.

• Axis strategic errors: Hitler's directive to fight a two-front war (invading the USSR while still at war with Britain) was a critical strategic blunder. Late mobilisation of Germany's economy for total war meant resources were not fully exploited until later in the conflict. Hitler's interference in military decisions, misuse of strategic reserves at Normandy (e.g., holding back panzer divisions), and the failed Ardennes offensive (Battle of the Bulge) in $Dec 1944$ exhausted key resources and manpower at critical junctures.

• Unified war aims & high-level cooperation: Despite ideological differences, the Allies maintained relatively unified war aims (defeat of Axis powers). Key conferences like Tehran ($1943$) and Yalta ($1945$) fostered high-level cooperation, leading to coordinated offensives and strategic planning. Yalta, specifically, settled post-war occupation plans for Germany and further coordinated the final offensives.

End of Conflict & Aftermath

• Western drive: Allied forces crossed the Rhine River in March $1945$, pushing deep into Germany. US and UK forces linked with the advancing Red Army at the Elbe River in April $1945$, effectively splitting Germany.

• Soviet advance: The Red Army launched its final, devastating assault on the German capital during the Battle of Berlin ($Apr–May 1945$). Adolf Hitler committed suicide on $30 Apr$ $1945$, and Germany signed an unconditional surrender on $8 May 1945$, which is celebrated as Victory in Europe (VE-Day).

• Nuremberg Trials $1945–49$: International military tribunals prosecuted $22$ top Nazi German officials for war crimes, crimes against humanity, and crimes against peace. These trials established critical precedents for international law, defining categories of crimes against humanity and affirming individual accountability for atrocities committed during wartime.