Complex sentence: The French XI Corps attacked at Beaumont Hamel on 19 November but failed to capture the village, after being held up by uncut wire and a diversion was conducted by XI Corps from 1915 at Toutvent Farm, to the south, during the Second Battle of Artois.
Split into simpler sentences: The French XI Corps attacked at Beaumont Hamel on 19 November but failed to capture the village, after being held up by uncut wire. A diversion was conducted by XI Corps from 1915 at Toutvent Farm, to the south, during the Second Battle of Artois.