Complex sentence: Between 19:20 and 19:30, "Vanguard" engaged several German destroyer flotillas with her main armament without result and the poor visibility hindered Jellicoe's ability to close with the Germans before Scheer was able to disengage under the cover of darkness.
Split into simpler sentences: Between 19:20 and 19:30, "Vanguard" engaged several German destroyer flotillas with her main armament without result. The poor visibility hindered Jellicoe's ability to close with the Germans before Scheer was able to disengage under the cover of darkness.