Complex sentence: Late in the afternoon, William Mahone's division attacked through the same woods that had stopped Crawford and seized the Dabney Mill Road, while a Confederate cavalry division under W.H.F. Lee moved up behind the Federals.
Split into simpler sentences: Late in the afternoon, William Mahone's division attacked through the same woods that had stopped Crawford and siezed the Dabney Mill Road. A cavalry division under W.H.F. Lee moved up behind the Federals.