The Second World War and the Unequal Peace of 1945
The Second World War defeated Nazi Germany and imperial Japan, but victory did not restore the political world of 1939. It produced occupation regimes, population displacement, new international institutions and a distribution of power that weakened old colonial empires while strengthening the United States and Soviet Union.
Big idea: The Allies could agree on defeating their enemies without agreeing on the political order that should replace them.
One war, several starting points
A European chronology conventionally begins in September 1939, when Germany invaded Poland and Britain and France declared war. An Asian chronology must begin earlier: Japan seized Manchuria in 1931 and full-scale war with China began in 1937. These conflicts became more tightly joined in 1941 through Germany's invasion of the Soviet Union and Japan's attacks on the United States and European colonial powers.
China was a major participant, not scenery before Pearl Harbor. Chinese resistance constrained Japan's strategy and resources. Japanese expansion into Southeast Asia also sought supplies and strategic freedom; its claims to liberate Asia from Western imperialism accompanied its own coercive imperial rule. Office of the Historian account.
This chronology changes the question. Instead of asking why everyone entered a European war, ask how regional wars of expansion and resistance became a connected global conflict.
Conquest and genocide were connected
Nazi expansion was not simply an attempt to revise Versailles. Racial ideology and the pursuit of territory in eastern Europe were central to the regime's aims. Occupation created opportunities and institutions for mass killing, forced labor and deliberate starvation. German forces and collaborators systematically murdered six million Jews in the Holocaust; Nazi persecution and warfare also killed millions of other civilians and prisoners.
The Holocaust should neither be detached from the war that enabled its escalation nor dissolved into a generic wartime death total. It was a specific genocide with identifiable victims, perpetrators, policies and evidence. USHMM account.
Allied victory depended on multiple fronts and societies: Soviet resistance and offensives, British and Commonwealth forces, American production and military power, Chinese resistance, occupied peoples' movements and many others. Recognizing that contribution does not require pretending that all Allied governments were democratic or that all Allied actions were just.
The war ended in stages
| Date | Event | What remained unresolved |
|---|---|---|
| May 1945 | Germany surrenders | Occupation, borders, displaced people and political reconstruction |
| July–August 1945 | Potsdam Conference | Major Allied disagreements over Germany and eastern Europe |
| August 1945 | Atomic bombings; Soviet entry against Japan; Japanese acceptance of surrender | Occupation terms and the futures of former Japanese territories |
| 2 September 1945 | Formal Japanese surrender | Civil wars and colonial restoration conflicts continued in Asia |
| October 1945 | UN comes into existence | How collective security would work amid great-power disagreement |
The atomic bombings of Hiroshima and Nagasaki and the Soviet entry into war against Japan occurred in a narrow interval. Historians debate their relative influence, Japan's internal decision-making and the alternatives available. A confident single-cause counterfactual exceeds the evidence: one cannot directly observe what would have happened without one of these shocks. National WWII Museum discussion.
Europe: moving borders and moving people
Germany was occupied in four zones. Poland lost eastern territories to the Soviet Union and acquired former German territories to the west and north. Flight, expulsion and resettlement transformed populations across a wide region. A map that simply says “Poland shifted west” conceals the households, property and communities that the shift disrupted.
Potsdam addressed transfers of German populations, but its stated desire for humane and orderly movement must not be mistaken for a description of what everyone experienced. The conference account also shows how reparations and occupation policy exposed differences between the Allies.
The military geography of liberation mattered. Armies occupying territory had leverage over its political future. Yet local parties, resistance movements and governments also mattered; postwar societies were not inert counters moved at a conference table.
The UN embodied a bargain, not a world government
The new organization combined a General Assembly with a Security Council in which five powers held permanent positions. Its design reflected wartime power as well as a desire to avoid another failed security system. The United States joined, unlike its relationship to the League of Nations. Formation of the UN.
The tension remains visible in the founding framework: sovereign equality is a principle, but the permanent members possess special voting power. Keeping those powers inside the institution required recognizing that enforcement against a major power's opposition would be difficult. The veto is therefore both a constraint on collective action and part of the bargain that made the organization possible. UN Charter.
Empire did not end on victory day
European colonial governments attempted to restore control in parts of Asia after Japanese defeat. Anticolonial movements had their own organizations and aims, strengthened by wartime disruption and the discrediting of European invulnerability. Independence was won through differing combinations of protest, negotiation and war, not simply granted because Europe was tired.
Suez in 1956 exposes the changed balance. After Egypt's Gamal Abdel Nasser nationalized the canal company, Britain and France colluded with Israel in an attack. International opposition and American financial and diplomatic pressure forced withdrawal. Egyptian political agency and US leverage mattered more than battlefield success alone. National Army Museum account.
Takeaway: In 1945 the defeat of aggressive empires, the survival of other imperial relationships, new claims to self-determination and the emerging Cold War all overlapped. They must be explained together without being collapsed into one story.