=Situation No. 5=:
The patrol has occupied a position at this point. At this moment you,
Sergeant Wilkins, observe a party of enemy cavalry approaching along the
road at a trot.
Two troopers are in the lead; at a distance of about 75 yards two more
follow; about 150 yards in rear there are four more troopers with short
distances between them. Apparently they have not observed your patrol.
_Required_:
What action do you take?