challenge any other party that may approach;
if the party challenged be senior to the one already on his post, the
sentinel will advance the new party at once. The senior may allow him
to advance any or all of the other parties; otherwise, the sentinel
will not advance any of them until the senior leaves him. He will then
advance the senior only of the remaining parties, and so on. (194)

=1755.= The following order of rank will govern a sentinel in
advancing different persons or parties approaching his post:
Commanding officer, officer of the day, officer of the guard,
officers, patrols, reliefs, noncommissioned officers of the guard in
order of rank, friends. (195)

=1756.= A sentinel will never allow himself to be surprised, nor
permit two parties to advance upon him at the same time. (196)

=1757.= If no countersign be used, the rules for challenging are the
same. The rules for advancing parties are modified only as follows:
Instead of saying "=Advance (so and so) with the countersign=," the
sentinel will say, "=Advance (so and so) to be recognized=." Upon
recognition he will say, "=Advance (so and so)=." (197)

=1758.= Answers to a sentinel's challenge intended to confuse or
mislead him are prohibited, but the use of such an answer as "=Friends
with the countersign=," is not to be understood as misleading, but as
the usual answer made by officers, patrols, etc., when the purpose of
their visit makes it desirable that their official capacity should not
be announced. (198)

Special Orders For Sentinels at the Post of the Guard

=1759.= Sentinels posted at the guard will be required to memorize the
following:

=Between reveille and retreat to turn out the guard for all persons
designated by the commanding officer, for all colors or standards not
cased, and in time of war for all armed parties approaching my post,
except troops at drill and reliefs and detachments of the guard.=

=At night, after challenging any person or party, to advance no one
but call the corporal of the guard, repeating the answer to the
challenge.= (199)

=1760.= After receiving an answer to his challenge, the sentinel
calls, "=Corporal of the guard (So and so)=," repeating the answer to
the challenge.

He does not in such cases repeat the number of his post. (200)

=1761.= He remains in the position assumed in challenging until the
corporal has recognized or advanced the person or party challenged,
when he resumes walking his pos