China's Role as an Ally Against Japan in WWII

Yes, China was a major Allied Power fighting against Japan in World War II. The conflict began years before the global war and became a crucial theater.

Second Sino-Japanese War (1937-1945)

• Start: Marco Polo Bridge Incident (July 7, 1937) — full-scale Japanese invasion
• Preceded by 1931 Manchuria invasion (Manchukuo puppet state)
• Merged into WWII after Pearl Harbor (Dec 1941)
• Ended: Japanese surrender (Sept 2, 1945)

China as an Allied Power

• One of the "Four Policemen" (Roosevelt's term) with US, UK, USSR — foundation of UN Security Council
• Tied down ~1 million Japanese troops (majority of Imperial Japanese Army)
• Received Lend-Lease aid (US), Burma Road supply route, Flying Tigers (AVG)
• Chiang Kai-shek (Nationalist) and Mao Zedong (Communist) both resisted — uneasy united front

Contribution and Cost

• Casualties: 15-20 million Chinese dead (military + civilian)
• Atrocities: Nanjing Massacre (1937), Unit 731 biological warfare, "Three Alls" policy
• Strategic impact: Prevented Japanese reinforcement of Pacific islands; enabled Allied "Europe first" strategy

Postwar Recognition

• China received permanent UN Security Council seat (ROC until 1971, then PRC)
• Return of Taiwan, Manchuria; renunciation of unequal treaties
• Civil war resumed (1946-1949) → PRC established

China's resistance was essential to Allied victory in the Pacific—absorbing the bulk of Japanese ground forces for eight years at catastrophic human cost.