What was the Second Sino-Japanese War?
The Second Sino-Japanese War, which began on July 7, 1937, was a major conflict between China and Japan. It originated from Japan's expansionist policies in China, including the consolidation of boundary areas to enlarge its economic sphere and the establishment of the puppet state of Manchukuo. The war escalated after Japanese troops engaged Chinese units at the Marco Polo Bridge near Beijing. Despite spirited Chinese resistance, Japanese armies captured key cities like Nanking and Hankow. The conflict continued until Japan's surrender in World War II in 1945.