The Battle of Pingxingguan (Chinese: 平型关战役; pinyin: Píngxíng Guān Zhànyì), also commonly called the "Great Victory of Pingxingguan" (Chinese: 平型关大捷; pinyin: Píngxíng Guān Dàjié) in Mainland China, was an engagement fought between the 8th Route Army of the Communist Party of China and the Imperial Japanese Army on September 25, 1937.