Commentary: World must remain on guard against Japanese militarism 80 years on

File photo shows Chinese soldiers fighting hard to resist Japanese invaders at Lugou Bridge in Beijing. China was the first nation to fight against fascist forces. The struggle started on September 18, 1931, when Japanese troops began their invasion of northeast China. It was intensified when Japan's full-scale invasion began after a crucial access point to Beijing, Lugou Bridge, also known as Marco Polo Bridge, was attacked by Japanese troops on July 7, 1937. (Xinhua)