Grand Alliance
US, UK, USSR and China as formal principals, with governments-in-exile and dominions supplying men and bases.
Darker cells mean a higher score for this topic on that metric.
Scale99
Intensity97
Duration58
Tech shift98
Political impact99
Cultural memory100
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Last reviewed Sources & creditsMedia creditsMethodology
Quick answers
Are the scores a ranking of nations or armies?
No. Scores are browsing aids inside an era-bounded atlas — not live league tables of countries.
How many people died?
Scholarly ranges centre on about 70-85 million dead, including combatants and civilians. The Soviet Union (about 24-27 million) and China (about 15-20 million, wide range) are the largest national totals. Precise counts remain impossible.
What was the Holocaust in this war?
Nazi Germany and collaborators murdered about six million Jews, using ghettos, shooting pits and killing centres, alongside mass murder of Roma, disabled people, Soviet POWs and others. It is documented as genocide within the wider war, not a side-effect.
Why did the Allies win?
No single cause. Coalition resources, Soviet manpower and industrial relocation, US production and sea power, intelligence, and Axis strategic overreach all matter. Historians argue about weights; they do not treat victory as destiny.
What ended the war in the Pacific?
Japan announced surrender on 15 August 1945 after the Hiroshima and Nagasaki bombings and the Soviet invasion of Manchuria; the formal instrument was signed on 2 September 1945 aboard USS Missouri. Debate continues on the relative weight of those shocks.
How did the war change Korea?
Japanese colonial rule collapsed in August 1945. US and Soviet occupation zones met at the 38th parallel, creating two Korean states by 1948 and the setting for the 1950-53 Korean War.
The Allies won as a coalition of unlike systems: a Soviet land colossus, a US maritime-industrial state, a British imperial network, and Chinese armies that tied down large Japanese forces.
Axis partners never matched that integration. Germany and Japan fought largely separate wars; Italy was a weaker partner that exited in 1943.
Systems
German-Italian-Japanese Axis
A pact system that never created a combined staff comparable to SHAEF or the Soviet Stavka.
War economies
Lend-Lease, Speer's late mobilisation, Soviet relocation, and Japanese inability to protect tankers.
Air and sea control
Battle of the Atlantic, US submarine war, and long-range bombing as campaigns of attrition.
Occupation machines
Reichskommissariats, Japanese military administration, and later Allied military government.
Intelligence nets
Ultra, Magic, partisans and embassy reporting -- historically described, not taught as tradecraft.
Meters
Geographic reach
99
Industrial mobilisation
96
Civilian targeting
94
Coalition cohesion
72
Nuclear threshold
100
Occupation depth
90
Hotspots
Eastern Front
The deadliest land theatre: from Barbarossa to Berlin, with Stalingrad and Kursk as named hinges.
Western Europe
1940 collapse, 1944-45 liberation campaign, and the Combined Bomber Offensive.
Pacific islands
Carrier and amphibious war from Midway to Okinawa, supplied across vast ocean distances.
China-Burma-India
A chronically under-resourced Allied theatre that still held large Japanese forces.
Atlantic convoy routes
U-boat and escort war that decided whether Britain and the USSR stayed supplied.
Materials
Oil and tankers
Ploiești, the Caucasus, Dutch East Indies fields and US refining -- campaigns followed fuel.
Steel and aluminium
Aircraft and armour production as national accounting, not workshop instruction.
Grain and famine
Collecting armies ate first; Bengal, the Netherlands (Hongerwinter) and Vietnam show civilian hunger as policy and collapse.
Rubber and rare ores
Southeast Asian resources were a Japanese war aim and an Allied blockade target.
Force structure here is historical: Wehrmacht, Red Army, US Army/Navy/USAAF, RAF, IJA/IJN -- not a modern ORBAT.
Women's labour, colonial troops and partisans belong in any honest force picture; the "great power" labels hide who actually marched and welded.