Complex sentence: The advance was limited by the bocage and sunken lanes but reached stream and then the west end of the village, before retiring to Tessel Wood under a smoke screen, due to the number of tank and other vehicle losses.
Split into simpler sentences: The advance was limited by the bocage and sunken lanes but reached stream. The attackers then reached the west end of the village, before retiring to Tessel Wood under a smoke screen, due to the number of tank and other vehicle losses.