World War II: The Eighth Route Army launches the Hundred Regiments Offensive, a successful campaign to disrupt Japanese war infrastructure and logistics in occupied northern China.

The Eighth Route Army, also known as the 18th Group Army, was a field army nominally under the banner of the National Revolutionary Army (NRA) of the Republic of China, established in 1937 as part of the Second United Front against Japan. In practice, the Eighth Route Army was under the exclusive command of the Chinese Communist Party (CCP) and operated independently of the Kuomintang (KMT) central military command. Unlike most NRA units, which were directly overseen by the Nationalist Government, the Eighth Route Army maintained separate political and operational structures aligned with CCP objectives.