pill-box type

The most common of the pillboxes built in Britain, although I only know of four on the Taunton Stop Line, this hexagonal bullet-proof infantry pillbox has walls up to 15 inches thick and stands 7 foot high from it's base.  Riflemen would have fired from it's 6 loopholes - one of which is built into each of the front and side walls with a smaller one to the left of the entrance in the rear wall.  With the limited visibility available through the loopholes, the defenders of this and other types of infantry pillbox might have found it easier, in certain circumstances, to identify and repel an attacking force from outside the box rather than within it's confines.   The structure above has block shuttering.