he sentinel's
challenge he answers "Relief," and at the order of the sentinel
he advances alone to give the countersign, or to be recognized.
When the sentinel says, "Advance relief," the corporal commands:
1. _Forward_, 2. MARCH.

If to be relieved, the sentinel is then relieved as prescribed.

131. Between retreat and reveille, the corporal of the guard
will challenge all suspicious looking persons or parties he may
observe, first halting his patrol or relief, if either be with
him. He will advance them in the same manner that sentinels on
post advance like parties (pars. 191 to 197), but if the route
of a patrol is on a continuous chain of sentinels, he should
not challenge persons coming near him unless he has reason to
believe that they have eluded the vigilance of sentinels.

132. Between retreat and reveille, whenever so ordered by an
officer entitled to inspect the guard, the corporal will call:
"Turn out the guard," announcing the title of the officer, and
then, if not otherwise ordered, he will salute and return to
his post.

133. As a general rule he will advance parties approaching the
guard at night in the same manner that sentinels on post advance
like parties. Thus, the sentinel at the guardhouse challenges
and repeats the answer to the corporal, as prescribed hereafter
(par. 200); the corporal, advancing at port arms, says: "Advance
(so and so) with the countersign," or "to be recognized," if
there be no countersign used; the countersign being correctly
given, or the party being duly recognized, the corporal says:
"Advance (so and so)," repeating the answer to the challenge
of the sentinel.

134. When officers of different rank approach the guardhouse
from different directions at the same time, the senior will be
advanced first, and will not be made to wait for his junior.

135. Out of ranks and under arms, the corporal salutes with the
rifle salute. He will salute all officers, whether by day or
night.

136. The corporal will examine parties halted and detained by
sentinels, and, if he have reason to believe the parties have
no authority to cross sentinel's posts, will conduct them to
the commander of the guard.

137. The corporal of the guard will arrest all suspicious looking
characters prowling about the post or camp, all persons of a
disorderly character disturbing the peace, and all persons taken
in the act of committing crime against the Government on a military
reservation or post.