b. Communication trenches usually lead away from the fire trenches and
connect the different parts of a defensive system.
c. Shelter trenches may only be slits, vehicle revements, or air raid
shelters.
d. Camouflage or dummy trenches may also be encountered; these are very
shallow and lack depth and shadow.
Figure 2-5.
Typical Trench System.
4. Breastworks are found in rocky terrain or low country susceptible to
Instead of digging, troops build up the ground to form a large
emplacement.
5. Dugouts may De found either leading from trenches or isolated close to a
trench system.
Spoil may reveal them.
When carefully concealed in
hedgerows or close country, however, comparative cover is necessary for
identification.
6. Bunkers are overhead enclosed, dug-in foxholes or a dug-in, or enclosed
firing trenches (Figure 2-6). Caves are the most common types of bunkers in
use.
7. Caves are very effective in jungle and mountainous terrain and in rugged
hill country. They afford maximum cover and concealment, are the easiest of
all Individual positions to camouflage, and because of their elevated
position over surrounding low ground, make good observation posts and
provide excellent fields of fire.
These positions are dug laterally into
the slopes of hills (Figure 2-7), ridges, snowdrifts, and snowbanks.
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