[DISCLAIMER: The following text is taken from the wartime U.S. War Department publication.
As with all wartime intelligence information, data may be incomplete or inaccurate. No
attempt has been made to update or correct the text. Any views or opinions
expressed do not necessarily represent those of the website.]
"Characteristic of enemy defenses was his complete reliance
placed on concealment from the ground. Trenches
were narrow; the parapet was spread out and never more
than 9 inches high. The effect was to make the trenches
most inconspicuous, and in one case an officer walked to
within 30 yards of an enemy post without seeing it.
There were no sandbags, few wire obstacles, and a general
absence of defense stores; though this may have been by
force of circumstances in the first instance, it proved
entirely effective in the event, and made his defenses
very difficult to locate. Revetting (facing of wall or
embankment) was usually dry-stone walling, but very
few posts had overhead cover, protection from the air
being obtained rather by the narrowness of the trenches
than by concealment. In one area a number of 'I'
(infantry) tank turrets were used as pillboxes in fixed
defenses and were very effective, providing good protection
and being easy to conceal.
"We must give more consideration to the siting of our
wire obstacles; provided that they are under fire (otherwise
they are practically useless as obstacles), it is better
to have them 200 yards away and concealed from the
enemy, such as on a reverse slope or in a hollow, than to
have them constructed to a geometric pattern 50 yards
from the post and in the open.
"If time permits, consideration should be given to
digging a wide shallow ditch in which to put the barbed
wire. But this involves a lot of digging and is possible
only in deliberate defenses.
"If it is not possible to conceal the barbed wire obstacle
in such a manner, it may well be preferable to obtain
concealment by having no (barbed) wire at all. In
such cases antipersonnel mines may be substituted, but
only if they are available in sufficiently large numbers."