Complex sentence: The was a series of newspaper stories about a "contest" between two Japanese Army officers during the Japanese invasion of China over which of them would first kill 100 people with his sword (See Kiri sute gomen).
Split into simpler sentences: The was a series of newspaper stories about a "contest" between two Japanese Army officers during the Japanese invasion of China. The contest was supposedly over which of them would first kill 100 people with his sword (See Kiri sute gomen).