The Second Sino - Japanese War was a military conflict fought primarily between the Republic of China and the Empire of Japan from July 7, 1937 to September 9, 1945. It began with the Marco Polo Bridge Incident in 1937 in which a dispute between Japanese and Chinese troops escalated into a battle. The conflict then escalated further into a full - scale war. It ended with the unconditional surrender of Japan on September 2, 1945 to the Allies of World War II.
who was china fighting in world war 2
the Empire of Japan