China

  • China entered the Second World War after a turbulent republican experiment, partial state-building under the Nationalists, chronic civil conflict, and deepening Japanese encroachment, all layered onto a predominantly agrarian, semi-colonial economy.

    Political landscape

    • China was officially the Republic of China, ruled by the Nationalist Party (Kuomintang, KMT) under Chiang Kai-shek, which claimed to be carrying out Sun Yat-sen’s three-stage program of military reunification, political tutelage, and eventual constitutional democracy.

    • After the Northern Expedition and Central Plains War, the Nanjing government achieved “nominal unification,” but real authority remained fragmented among regional warlords, local militarists, and competing political centers.

    • Throughout the 1930s, a bitter civil war pitted the KMT against the Chinese Communist Party, including five major “extermination campaigns” that drove the Red Army on the Long March and forced the CCP into remote bases.

    State-building and governance

    • The so‑called Nanjing Decade (1927–1937) saw the KMT build modern state institutions such as the Central Bank of China and Academia Sinica, and promulgate a provisional constitution to justify its tutelary rule.

    • Despite these reforms, central fiscal capacity was weak: provinces retained land-tax revenue, warlords and local elites controlled much of the countryside, and the government relied heavily on borrowing and bond issues to fund administration and the army.

    • The regime was politically conservative and authoritarian, suppressing left-wing movements and dissent while trying to project a modern, unified Chinese nationalism at home and abroad.

    Foreign pressure and semi-colonial status

    • China remained constrained by unequal treaties and foreign spheres of influence; although tariff autonomy was largely restored by 1930, foreign-controlled customs and treaty-port privileges still limited sovereignty.

    • Japan emerged as the most dangerous external threat: after years of pressure in Manchuria and North China, the Kwantung Army staged the Mukden Incident in 1931 and rapidly occupied Manchuria, creating the puppet state of Manchukuo in 1932.

    • By 1937, Japan had seized large sections of North and coastal China, and escalating “incidents” had turned into full-scale war, even before the European conflict formally began.

    Economic structure and performance

    • China’s economy was still overwhelmingly agrarian, with large rural inequalities and low productivity; yet the Nanjing Decade also brought notable industrialization, especially in textiles, light manufacturing, and state-directed military industry.

    • From roughly 1929 to 1941, GDP growth is estimated at about 3.9 percent annually and per capita growth at around 1.8 percent, indicating modest but real gains from a low base.

    • The government used tariff increases and monetary reforms, including a major fiat currency reform to tackle silver-price shocks in the 1930s, to stabilize finances and unify the currency system.

    Social tensions and strategic constraints

    • Urban modernity—new banks, factories, universities, and infrastructure—contrasted sharply with impoverished rural regions where warlordism, banditry, and landlord‑peasant conflicts persisted.

    • Nationalist mobilization surged after the May Fourth and May 30th movements, but the state’s limited reach, internal factionalism, and the ongoing KMT–CCP struggle undermined its ability to resist foreign aggression effectively.

    • By the time full-scale war with Japan erupted in 1937, China was a partially modernized but politically fragile state, balancing internal consolidation against existential external threats.

  • China was an Allied power in the Second World War, counted among the “Big Four” Allies alongside the United States, the United Kingdom, and the Soviet Union.

    Formal alignment

    • The Republic of China had been at war with Japan since 1937, but it is treated as formally joining the Allies after the Japanese attack on Pearl Harbor in December 1941.

    • On January 1st 1942, China signed the Declaration by United Nations in Washington, D.C., becoming one of the four founding signatories and giving its government a central place in the Allied coalition structure.

    Status within the Allies

    • China was officially recognized as one of the “Big Four” Allied powers and later one of the five permanent members of the UN Security Council, reflecting its status as a major victor state.

    • Roosevelt promoted China’s great-power role both to keep it in the war against Japan and to have an Asian partner in the postwar order, a concept often described as the “Four Policemen.”

    Relationship with Axis and occupied areas

    • China’s main enemy in the war was the Empire of Japan, which occupied large parts of Chinese territory including Manchuria and coastal regions, while Nanjing and other collaborationist regimes were set up under Japanese control.

    • The Nationalist government in Chongqing maintained diplomatic hostility to Germany and Italy, declaring war on them after the widening of the conflict, but its fighting was overwhelmingly concentrated against Japanese and puppet forces in China and Burma.

  • China’s war against the Axis unfolded in two stages: an undeclared but full-scale war with Japan from 1937, and a formal entry into World War II as an Allied belligerent in December 1941.

    Start of fighting with Japan

    • Large-scale hostilities began with the Marco Polo Bridge Incident near Beijing on July 7th 1937, when a clash between Japanese and Chinese troops escalated into the full Second Sino‑Japanese War.

    • By the end of 1937, Japan had launched major campaigns such as the Battle of Shanghai and captured Nanjing, turning the conflict into a protracted, nationwide war that many historians treat as the Asian start of World War II.

    Legal/official entry into WWII

    • For political and diplomatic reasons, China fought this conflict as an “undeclared war” until late 1941, even though the scale and intensity matched any front in the global conflict.

    • After Japan’s attack on Pearl Harbor and wider moves across Southeast Asia, the Nationalist government formally declared war on Japan on December 9th 1941, simultaneously declaring war on Germany and Italy and thus explicitly aligning itself with the Allied camp in the wider World War II framework.

    Integration into the Allied coalition

    • Following these declarations, China became one of the core Allied powers in the Pacific theater, coordinating strategy with the United States and Britain and hosting Allied logistics and air operations from bases in the Chinese interior and Burma.

    • This formal status was cemented when China joined as a founding signatory of the Declaration by United Nations on January 1st 1942, marking its full diplomatic integration into the Allied war effort.

  • China’s military contribution to World War II was huge: it tied down the bulk of the Japanese Army for eight years, mobilized millions of troops, and suffered some of the heaviest casualties of any belligerent.

    Scale of mobilization and fronts

    • The Nationalist government at its height fielded roughly 4 million troops in the National Revolutionary Army, fighting primarily on the China front and later in the China–Burma–India theater.

    • Chinese forces engaged Japan from 1937 to 1945 across multiple fronts—North China, the Yangtze valley, South and Southwest China—forcing Tokyo to keep most of its ground forces on the mainland rather than in the Pacific islands.

    Major campaigns and operations

    • Key early battles included Shanghai (1937), Nanjing (1937), Taierzhuang (1938), and the prolonged defense of Wuhan and Changsha, where Chinese armies absorbed enormous losses to slow Japanese advances.

    • Later in the war, Chinese troops fought alongside Allied forces in Burma, helped protect the Hump airlift route from India, and resisted Japan’s massive Ichi‑Go offensive in 1944, even as that campaign overran large swaths of central and southern China.

    Impact on Japan’s war effort

    • By keeping millions of Japanese soldiers bogged down in China, Chinese resistance limited Japan’s ability to redeploy ground forces against the United States and the British Empire in the Pacific and Southeast Asia.

    • Chinese forces killed, wounded, or captured over 1.5 million Japanese troops according to postwar Chinese research, imposing a major attritional burden on Japan’s army and logistics.

    Casualties and losses

    • Estimates vary, but scholars commonly place total Chinese war deaths between about 10 and 20 million people, with some Chinese official figures citing more than 35 million military and civilian casualties (killed and wounded) over the 1937–45 period.

    • Recent Chinese studies estimate around 3–4 million military casualties and very high civilian losses from massacres, bombing, famine, and disease in occupied areas, making China one of the hardest‑hit Allied countries of the war.

  • China’s wartime economy never became a full “industrial war machine” like the U.S. or USSR, but it sustained long resistance by relocating industry inland, expanding arsenals, and financing the war through extreme monetary measures.

    Industrial base and relocation

    • Japan’s early capture of coastal and treaty‑port regions stripped China of most modern industry, including Shanghai’s textile and engineering base, forcing the Nationalist government to rebuild capacity in the southwest (Sichuan, Chongqing, Kunming).

    • State and private firms uprooted factories and arsenals and moved them inland; complexes like the 21st Arsenal near Chongqing supplied a large share of Chinese small arms and ammunition throughout the war.

    War industry output

    • Chinese arsenals focused on small‑arms and light weapons: Mauser‑pattern rifles and Hanyang 88s, light machine guns, mortars, grenades, and ammunition, with output sometimes reaching hundreds of thousands of rifles and tens of thousands of machine guns over the war years.

    • Production capacity remained modest by global standards and depended heavily on imported machinery and Allied supplies, but domestic output was crucial in keeping Chinese armies in the field once foreign arms purchases became difficult.

    Finance, currency, and inflation

    • Pre‑war monetary reform had created the fabi as a government paper currency in 1935, but the Japanese invasion shattered its stability; puppet regimes and Japanese authorities issued rival currencies and conducted a “currency war” to undermine fabi’s value.

    • To fund the war after losing major tax bases, the Nationalist government relied on deficit finance and money printing; price indices that had roughly tripled by 1941 exploded to well over a thousand times their pre‑war level by 1945, producing severe hyperinflation in “Free China.”

    Overall economic impact

    • Agriculture and handicrafts remained dominant, with massive disruption in occupied areas and severe strain in the interior as refugees, military requisitions, and destroyed transport networks reduced market integration and living standards.

    • Despite pockets of industrial growth in the southwest and the development of a dispersed cooperative‑industry movement (Indusco), the wartime economy emerged exhausted, with shattered infrastructure and a devalued currency that badly weakened the Nationalist regime after 1945.

  • China’s World War II experience is defined by years of brutal land campaigns against Japan, devastating attacks on cities, and one huge late‑war Japanese offensive that nearly broke Chinese resistance.

    1937–1938: Invasion and early battles

    • Marco Polo Bridge Incident (July 1937): Clash near Beijing that escalated into full‑scale war; Japan swiftly took Beijing–Tianjin and pushed south along key railways.britannica+1​

    • Battle of Shanghai (Aug–Nov 1937): Months of urban and riverine fighting in China’s main port; Chinese forces suffered massive losses but delayed Japan and signaled determined resistance.

    • Fall of Nanjing and Nanjing Massacre (Dec 1937): After Nanjing’s capture, Japanese troops committed mass killings and rapes of civilians and POWs over several weeks, one of the war’s worst atrocities.

    • Battle of Wuhan (Jun–Oct 1938): One of the largest battles in China, ending with Japanese occupation of the Wuhan region and a shift to a more protracted war of attrition.

    Stalemate and attrition, 1938–1943

    • Taierzhuang and other campaigns (1938–1942): Battles like Taierzhuang and multiple campaigns around Changsha gave China rare operational victories and showed Japan’s limits in interior China.

    • Chongqing bombing (1938–1943): Japan subjected the wartime capital Chongqing to years of strategic bombing, killing tens of thousands and attempting to break Chinese morale.

    • Burma Road and Hump airlift (from 1938/1942): The Burma Road linked British Burma to Yunnan, and after its loss, U.S. aircraft flew supplies “over the Hump” from India, keeping China in the war.

    Communist resistance and guerrilla war

    • North China guerrilla campaigns: Communist Eighth Route Army and New Fourth Army waged guerrilla war behind Japanese lines, as at Pingxingguan, tying down Japanese forces and building rural bases.

    • Base‑area expansion: Communist base areas in Shanxi, Hebei, Shandong, and elsewhere expanded under the cover of anti‑Japanese resistance, reshaping China’s internal political landscape.

    1944–1945: Operation Ichi‑Go and the endgame

    • Operation Ichi‑Go (1944–1945): Japan’s largest land offensive in China aimed to open a corridor to Indochina and destroy U.S. bomber bases; Japanese forces overran much of Henan, Hunan, and Guangxi and inflicted heavy Chinese losses.

    • Final campaigns and Japanese surrender (1945): Despite Ichi‑Go, China stayed in the war; as U.S. forces closed in on Japan, Chinese armies mounted local offensives, and Japan’s surrender in August 1945 ended eight years of full‑scale war on Chinese soil.

  • China suffered some of the highest human losses of World War II, with scholarly estimates clustering around roughly 14–20 million dead, and Chinese official figures putting total military and civilian casualties above 35 million (killed and wounded).

    Overall ranges and official figures

    • Many historians estimate around 10–20 million Chinese deaths, with a commonly cited figure of about 14 million total dead (roughly 2 million combatants and 12 million civilians).

    • The PRC’s official statistic for the 1937–1945 war is about 20 million dead and 15 million wounded, while recent Chinese government research cites “more than 35 million” total military and non‑military casualties.

    Military casualties

    • One influential breakdown, cited in international surveys, gives approximately 2–3 million Chinese military dead, with total military casualties (killed, wounded, missing, deaths from disease) around 6–7 million or more once Nationalist, Communist, and collaborator forces are included.

    • Official Nationalist wartime figures (about 1.3 million killed and 1.7 million wounded) are now regarded as unrealistically low; later Chinese research revises total military casualties upward to roughly 3.8 million for the broader resistance period.

    Civilian casualties

    • Civilian losses vastly outweighed military ones: several studies suggest on the order of 10–18 million Chinese civilians killed through massacres, bombing, famine, forced labor, and disease.

    • Events such as the Nanjing Massacre, “three‑all” campaigns, scorched‑earth operations, induced famines, and epidemic disease in war zones contributed heavily to these deaths and left long‑term demographic scars.

  • Large parts of Chinese territory were under Japanese occupation during the war, with multiple puppet regimes set up, while several foreign colonial enclaves on Chinese soil followed their own wartime trajectories.

    Japanese-occupied zones and puppet states

    • After the invasion of Manchuria (1931–32), Japan created Manchukuo, a puppet state in Northeast China under the nominal rule of the last Qing emperor Puyi, which lasted until 1945 and served as a major base for further invasion.

    • In 1940 Japan sponsored the Reorganized National Government under Wang Jingwei in Nanjing, a collaborationist “Republic of China” that administered much of Japanese‑occupied central and eastern China but depended entirely on Japanese military power.

    Other Japanese client entities

    • Japan also encouraged breakaway entities in Inner Mongolia, such as Mengjiang, and cultivated local collaborationist administrations and a “collaborationist Chinese army” to police occupied areas and fight anti‑Japanese forces.

    • These puppet authorities claimed to be legitimate Chinese governments or regional autonomies but were internationally unrecognized and broadly seen as instruments of Japanese control.

    Foreign colonies and concessions in China

    • Before and during the war, China contained foreign-controlled enclaves such as British Hong Kong, Portuguese Macau, the Shanghai International Settlement, and smaller French and other leaseholds like Guangzhouwan.

    • Hong Kong remained a British colony until Japan captured it in December 1941, while Macau stayed under Portuguese administration and officially neutral for the whole war, although it was heavily affected by nearby fighting and refugee flows.

    Refuge, neutrality, and later occupation

    • In the late 1930s, British Hong Kong and Portuguese Macau acted as neutral havens drawing large numbers of Chinese refugees fleeing Japanese advances in Guangdong and beyond; Hong Kong’s population roughly doubled and Macau’s reportedly tripled between 1937 and the early 1940s.

    • After Hong Kong fell to Japan and other enclaves came under greater Japanese pressure, these territories’ status shifted from relative safe havens to zones under direct or indirect Axis influence, further fragmenting Chinese sovereignty during the war.

  • China emerged from World War II formally as a major victorious power and UN Security Council permanent member, but internally it moved almost immediately into renewed civil war, hyperinflation, and eventual Communist revolution.

    Immediate political aftermath

    • After Japan’s surrender in 1945, the truce between Nationalists (KMT) and Communists collapsed, and full-scale civil war resumed by 1946, pitting Chiang Kai‑shek’s government against Mao Zedong’s CCP across most of the country.

    • By late 1949 the CCP had won decisive campaigns, proclaimed the People’s Republic of China (PRC) on October 1st 1949, and forced the Nationalist leadership to retreat to Taiwan, where they maintained the Republic of China (ROC) government.

    International status and the UN

    • In the immediate postwar order, “China” (represented by the ROC) was recognized as one of the five permanent members of the UN Security Council and a founding member of the United Nations in 1945, reflecting its status as a major Allied victor.

    • Even after losing the mainland in 1949, the ROC continued to hold China’s UN and Security Council seat until 1971, when UN General Assembly Resolution 2758 transferred recognition and the permanent seat to the PRC.

    Postwar economic crisis

    • Years of war left industry and infrastructure devastated: by 1945 industrial output in Nationalist‑controlled areas was little more than one‑tenth of its prewar level, while transport networks and rural production were badly damaged.

    • The KMT government faced enormous fiscal deficits from continued military spending and reconstruction costs; relying heavily on money printing, it triggered runaway hyperinflation that wiped out savings, undermined urban economies, and eroded public support.

    Economic split after 1949

    • After the Communist victory, the PRC launched land reform and state‑led reconstruction on the mainland, while the ROC on Taiwan, after its own postwar inflation and political turmoil, eventually pursued U.S.-backed stabilization and export‑oriented development.

    • This produced a long‑term bifurcation: a large socialist mainland state claiming succession to China’s wartime victory and UN role, and a smaller anti‑Communist regime on Taiwan that nonetheless continued to present itself internationally as the legitimate Republic of China for decades.