ESTABLISH AND SUPERVISE A DEFILE
Critical Task: 191-377-4204
In this lesson you will learn to establish and supervise a defile to include: conducting a reconnaissance
of the area, determine how to operate it, establish security, select holding areas, position temporary
signs, control access, and clear vehicle breakdowns.
TERMINAL LEARNING OBJECTIVE:
Establish and supervise a defile.
You will have this subcourse, pencil and paper.
To demonstrate competency on this task you must achieve a minimum score of
70 percent on the final subcourse examination.
The material contained in this lesson was derived from the following publications:
FM 19-4 and STP 19-95B2/3.
A defile is a narrow passage that constricts the movement of troops and vehicles. Military police
(MP) conduct defile operations when natural or man-made obstacles restrict traffic flow on main supply
a. Defile operations prevent traffic jams. The MP allow traffic to move in only one direction at a
time through the defile. Controls at defiles ensure that traffic moves with little delay.
b. There are times you will be delayed by a defile at a highway construction site or traffic incident
as you move about your city or state. Note the amount of congestion at the site. Picture the area
under combat conditions. Imagine the damage to property and casualties you could inflict upon the
enemy in a like situation. Now you can understand the importance of security at a defile; also the need
for holding areas that offer good cover and concealment.