who helped china in ww2?
United States of America
contradiction
 According to modern historic research , however , such a conspiracy did not exist and is considered Allied propaganda . Although there was a limited and cautious military cooperation between Japan and Germany during the Second World War , no documents corroborating any long @-@ term planning or real coordination of military operations of both powers exist . 

entailment
 The Second Sino @-@ Japanese War ( 1937 – 1945 ) , a theatre of World War II , forced an uneasy alliance between the Kuomintang and the Communists . Japanese forces committed numerous war atrocities against the civilian population ; in all , as many as 20 million Chinese civilians died . An estimated 200 @,@ 000 Chinese were massacred in the city of Nanjing alone during the Japanese occupation . During the war , China , along with the UK , the US and the Soviet Union , were referred to as " trusteeship of the powerful " and were recognized as the Allied " Big Four " in the Declaration by United Nations . Along with the other three great powers , China was one of the four major Allies of World War II , and was later considered one of the primary victors in the war . After the surrender of Japan in 1945 , Taiwan , including the Pescadores , was returned to Chinese control . China emerged victorious but war @-@ ravaged and financially drained . The continued distrust between the Kuomintang and the Communists led to the resumption of civil war . In 1947 , constitutional rule was established , but because of the ongoing unrest , many provisions of the ROC constitution were never implemented in mainland China . 

contradiction
 The Empire of Japan invaded other parts of China in 1937 , precipitating the Second Sino @-@ Japanese War ( 1937 – 1945 ) . The Imperial Japanese Army swiftly captured the capital Nanjing and conducted the Nanking Massacre . In 1940 , the Empire then invaded French Indochina , after which the United States placed an oil embargo on Japan . On December 7 – 8 , 1941 , Japanese forces carried out surprise attacks on Pearl Harbor , attacks on British forces in Malaya , Singapore , and Hong Kong and declared war , bringing the US and the UK into World War II in the Pacific . After the Soviet invasion of Manchuria and the atomic bombings of Hiroshima and Nagasaki in 1945 , Japan agreed to an unconditional surrender on August 15 . The war cost Japan and the rest of the Greater East Asia Co @-@ Prosperity Sphere millions of lives and left much of the nation 's industry and infrastructure destroyed . The Allies ( led by the US ) repatriated millions of ethnic Japanese from colonies and military camps throughout Asia , largely eliminating the Japanese empire and restoring the independence of its conquered territories . The Allies also convened the International Military Tribunal for the Far East on May 3 , 1946 to prosecute some Japanese leaders for war crimes . However , the bacteriological research units and members of the imperial family involved in the war were exonerated from criminal prosecutions by the Supreme Commander for the Allied Powers despite calls for trials for both groups . 

entailment
 Too weak to resist Japan , China appealed to the League of Nations for help . Japan withdrew from the League of Nations after being condemned for its incursion into Manchuria . The two nations then fought several battles , in Shanghai , Rehe and Hebei , until the Tanggu Truce was signed in 1933 . Thereafter , Chinese volunteer forces continued the resistance to Japanese aggression in Manchuria , and Chahar and Suiyuan . After the 1936 Xi 'an Incident , the Kuomintang and communist forces agreed on a ceasefire to present a united front to oppose Japan . 

contradiction
 In China , nationalist and communist forces resumed the civil war in June 1946 . Communist forces were victorious and established the People 's Republic of China on the mainland , while nationalist forces retreated to Taiwan in 1949 . In the Middle East , the Arab rejection of the United Nations Partition Plan for Palestine and the creation of Israel marked the escalation of the Arab @-@ Israeli conflict . While European colonial powers attempted to retain some or all of their colonial empires , their losses of prestige and resources during the war rendered this unsuccessful , leading to decolonisation . 
