manual for commanders of infantry platoons. - US Army Combined ...

,242 IMCANUAL FOR1 CO1b/flANDERS OF -INFNTIm'CBY PLATOONS.5
,flor in thle plan of defense. ;ach E commlunicating trenlch from
its origin to the advanced paratllel should be given a. distinct
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Alrrange crzossings in such a2fashion that once having entered
the aEpproachJ trench it; will guide a manl to the advance trench.
O~ne met~hod of doing this is to arrange a step into the bott~om
of thre tranusver~set~rench where it enters the approachi trench.
Anotheur way is to wedge a strong stick; across the opening of
the si(Ie trench. WCahere a transver~setrench is croqssed ramps
f!romuit to a footbridge over it shouldl be constructed, so that if
both it andl the approachtrench are being u~sedi at; the same: tim~ex
those in? the tratnsversee trench may use the ramp? andi bnridg'e.
Mlark out the approach and transverse trenches by means off
numerous signboards -of different; shapes, siz;es, and colors for
principal andt secondary approach trenches, for those to be used
to>go to t'he fronit, for those ursed to go to the rear, andt · for