Complex sentence: On 16 January 1918, Chinese southern revolutionary troops attacked the little warship above Chenglin; during which "Monocacy" prevented the rebels from firing on a Japanese steamer standing down stream.
Split into simpler sentences: On 16 January 1918, Chinese southern revolutionary troops attacked the little warship above Chenglin. During which "Monocacy" prevented the rebels from firing on a Japanese steamer standing down stream.