The big idea: After the League of Nations failed in the early 1930s, Britain and France shifted to appeasement — making concessions to aggressive states to avoid another war. The policy reached its peak in 1938 when Neville Chamberlain gave Hitler the Sudetenland at the Munich Conference. Within a year, war had started anyway.
What was collective security — and why did it collapse?
Collective security was the founding principle of the League of Nations. In the early 1920s it seemed workable — the great powers were exhausted and cautious. But when Japan seized Manchuria in 1931 and Italy invaded Abyssinia in 1935, the League imposed only weak sanctions and did nothing to stop the aggressor. Britain and France — the two powers that kept the League going — were unwilling to risk war.
By 1936, collective security was dead in practice. Germany remilitarised the Rhineland in March 1936; neither Britain nor France intervened. The lesson aggressors drew was clear: the democracies would back down.
British, French and Soviet foreign policies (1919–1941)
Britain and France — Appeasement
- Deeply scarred by WWI losses — public and politicians feared another war above all
- Believed the Versailles settlement had been too harsh on Germany; Hitler's demands seemed partly justified
- Needed time to rearm — Britain's RAF and army were not ready in 1938
- Assumed economic concessions and compromise would satisfy Hitler's ambitions
- France followed Britain's lead; internally divided between left and right, it could not act alone
Soviet Union — a different path
- Stalin feared a capitalist coalition against the USSR more than Hitler alone
- Sought collective security alliances with Britain and France — rejected or side-lined at Munich (USSR not invited)
- In August 1939 Stalin signed the Nazi-Soviet Non-Aggression Pact — buying time and gaining eastern Poland
- The Pact shocked the West and freed Hitler for war in the west
- Stalin's mistrust of the West was deepened by his exclusion from Munich
The Munich Crisis (September 1938)
The Sudetenland was home to about three million German speakers inside Czechoslovakia. From early 1938 Hitler demanded its transfer to Germany, encouraging a local Nazi party led by Konrad Henlein to create unrest. By September a European war seemed imminent.
Chamberlain flew to Germany three times in two weeks — an extraordinary personal diplomacy. At the Munich Conference on 29–30 September 1938, Britain (Chamberlain), France (Daladier), Italy (Mussolini) and Germany (Hitler) agreed to hand the Sudetenland to Germany. Czechoslovakia was not invited and had no choice but to comply. The Soviet Union was also excluded.
Chamberlain returned to London waving a piece of paper, declaring "peace for our time." The Czechoslovak state lost its mountain fortifications and much of its industry.
Why Munich is a turning point: Appeasement failed for three reasons:
1. Hitler's aims were not limited. In March 1939 Germany occupied the rest of Czechoslovakia — violating the Munich agreement and proving the policy had achieved nothing. 2. It encouraged further aggression. When Hitler turned to Poland in 1939, he expected another climb-down. 3. It weakened deterrence. Britain and France had shown they would concede under pressure.
Paper 3 exam skill — evaluating appeasement: Questions often ask you to assess the extent to which appeasement caused the Second World War. Do not simply condemn it. Acknowledge the genuine constraints (public opinion, military unreadiness, economic exhaustion) before arguing that it ultimately emboldened Hitler. Show both sides, then deliver a clear judgement.
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The big idea: The war that began in September 1939 had long-term causes going back to Versailles and short-term causes rooted in Hitler's decisions and Western failures. It then expanded rapidly — by mid-1941 almost all of Europe was at war.
Long-term and short-term causes
Versailles legacy (long-term)
The 1919 peace left Germany humiliated but not destroyed. The war guilt clause, reparations and territorial losses created lasting bitterness that Hitler exploited from the start.
Rise of aggressive nationalism (medium-term)
Hitler rebuilt German military power after 1933, reoccupied the Rhineland (1936), annexed Austria in the Anschluss (March 1938), and took the Sudetenland (October 1938). Each step met no effective resistance.
Failure of collective security (medium-term)
The League's inability to stop Japan (1931) and Italy (1935) convinced aggressors that the democratic powers lacked the will to fight.
Nazi-Soviet Pact (immediate cause)
The Molotov-Ribbentrop Pact of August 1939 contained a secret protocol dividing Poland and eastern Europe. It freed Hitler from the threat of a two-front war — making the invasion of Poland feasible.
German invasion of Poland (immediate trigger)
On 1 September 1939 Germany invaded Poland. Britain and France issued an ultimatum; when ignored, they declared war on 3 September 1939.
Development of European conflict (1939–1941)
| Date | Event | Significance |
|---|---|---|
| Sept 1939 | Germany and USSR invade Poland | Poland divided; war formally begins |
| Apr–June 1940 | Fall of France; Dunkirk evacuation | France falls in six weeks; Germany dominates western Europe |
| July–Oct 1940 | Battle of Britain | RAF defeats Luftwaffe; Hitler abandons invasion of Britain |
| Apr 1941 | Germany invades Yugoslavia and Greece | Axis controls the Balkans |
| 22 June 1941 | Operation Barbarossa — Germany invades USSR | War becomes a global struggle; eastern front dwarfs all others in scale and brutality |
By December 1941 — a truly global war: When Japan attacked Pearl Harbor (December 1941) the conflict merged with the war in Asia. But for Paper 3 Europe, keep your focus on the European theatre: the eastern front, the western campaigns and the wartime alliance between Britain, the USA (from December 1941) and the USSR.
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The big idea: Germany and its allies were eventually beaten by a coalition whose combined resources they could never match. The war also devastated civilian populations — through bombing, occupation, genocide and starvation — on a scale never seen before.
The wartime alliance (1941–1945)
The Grand Alliance was formed after Germany invaded the USSR (June 1941) and the USA entered the war (December 1941). It was an alliance of necessity — Churchill had opposed communism all his life — but it held together long enough to defeat Germany.
Key moments of alliance diplomacy:
- Atlantic Charter (August 1941) — Roosevelt and Churchill agreed broad war aims including self-determination and freedom from fear.
- Tehran Conference (November 1943) — Churchill, Roosevelt and Stalin agreed on the timing of the D-Day invasion and early Soviet support in the Pacific.
- Yalta Conference (February 1945) — The Big Three planned post-war Europe, agreed to divide Germany into zones and create the United Nations.
- Potsdam Conference (July–August 1945) — After Germany's defeat, tensions over eastern Europe foreshadowed the Cold War.
Reasons for Axis defeat and Allied victory
Economic factors — the production war
The USA's industrial capacity was decisive. Between 1942 and 1945, American factories produced more tanks, aircraft and ships than all Axis powers combined. The USSR also massively expanded its production after relocating factories east of the Urals. Germany, by contrast, failed to convert fully to a war economy until 1942 under Albert Speer — too late. The Allied naval blockade cut off raw materials.
Strategic overreach — a war on too many fronts
Hitler opened Operation Barbarossa (June 1941) before defeating Britain — repeating the two-front mistake of WWI. The invasion of the USSR committed three million German troops to a theatre where the distances were vast and Soviet resistance ferocious. Defeats at Stalingrad (1942–43) and Kursk (1943) ended any hope of a quick eastern victory.
Military and strategic errors
Hitler's increasing personal control of military strategy led to catastrophic decisions — refusing retreats at Stalingrad, splitting Army Group South in 1942, and declaring war on the USA after Pearl Harbor. The Allies, by contrast, developed effective joint strategy through the Combined Chiefs of Staff.
Allied air power and the D-Day opening of a second front
Allied strategic bombing disrupted German fuel and transport from 1943 onwards. The D-Day landings (6 June 1944) opened a second major front in western Europe, forcing Germany to fight on three fronts simultaneously: east, west and Italy.
Soviet military contribution
The eastern front was the war's largest land theatre. The USSR suffered an estimated 27 million deaths but ultimately destroyed the bulk of the German army. Operations like Bagration (summer 1944) shattered Army Group Centre more decisively than anything in the west.
Impact on civilian populations (two country case studies)
Case Study A — Germany: Bombing: From 1942 onwards the Allied Combined Bomber Offensive targeted German cities. Hamburg (1943) and Dresden (February 1945) suffered firestorms killing tens of thousands. By 1945 most major German cities were rubble.
Nazi racial terror: The Holocaust killed approximately six million Jews and millions of others (Roma, disabled people, Soviet POWs) — an organised, state-directed genocide enabled by war conditions.
Final months: Soviet advances in early 1945 triggered mass German civilian flight westward; rape, looting and reprisal killings were widespread. Millions were expelled from eastern Europe after the war.
Case Study B — France: Occupation (1940–1944): France was divided into an occupied north (under direct German military rule) and the Vichy zone governed by Pétain's collaborationist regime. Vichy implemented its own anti-Semitic laws without German orders.
Economic exploitation: Germany extracted food, raw materials and forced labour from France throughout the occupation; French workers were conscripted under the Service du Travail Obligatoire (STO) from 1942.
Resistance and reprisals: The French Resistance (Résistance) grew after 1942. German reprisals against civilian communities were brutal — for example the massacre at Oradour-sur-Glane (June 1944) where 642 civilians were killed.
Paper 3 — flexibility on the two-country question: The syllabus says any two countries — you are not locked into Germany and France. Other strong options include the USSR (siege of Leningrad, total civilian mobilisation, mass starvation), Poland (Nazi and Soviet occupation, Warsaw Uprising, 1944) and Britain (Blitz, rationing, evacuation). Choose the two you know best and have the most specific evidence for.