Complex sentence: The 3rd Australian Division advanced either side the river Douve, consolidating their hold on a rise around Thatched Cottage, which secured the right flank of the new Messines position; early on 11 June the Germans evacuated the Blauwepoortbeek sector.
Split into simpler sentences: The 3rd Australian Division advanced astride the river Douve, consolidating their hold on a rise around Thatched Cottage, which secured the right flank of the new Messines position. Early on 11 June the Germans evacuated the Blauwepoortbeek sector.