FM 3-34.22 - Army Electronic Publications & Forms - U.S. Army

Chapter 6
Intelligence Preparation of the Battlefield
Figure 6-6. Example of an infiltration
6-62. Infiltrations require extensive reconnaissance to be successful. This reconnaissance includes—
� Identifying the enemy disposition across the area to be infiltrated.
� Identifying infiltration lanes.
� Locating assault positions for the attacking force.
� Identifying enemy weaknesses.
� Observing enemy activity.
6-63. Engineer reconnaissance assists the commander in determining the method of infiltration, the task
organization, and the size of the infiltrating units. OBSTINTEL is critical. Reconnaissance is also vital in
determining actual routes and whether single or multiple infiltration lanes are used. Successful engineer
support to an infiltration is predicated by careful, detailed terrain analysis by the ENCOORD and engineer
unit commanders.
6-64. Existing gaps in the enemy defensive system and the locations of enemy security elements must be
identified. Natural obstacles and predicted enemy obstacles must also be considered. Engineers infiltrating
with the RS and battalion scouts verify, report (OBSTINTEL), mark, and (as required) reduce obstacles
along the infiltration lanes.
6-65. The ENCOORD develops IR for inclusion in the S-2 collection plan. In addition to the IR developed
in support of the infiltration itself, others are identified specifically at the objective area (especially
OBSTINTEL). ERTs may be identified to support selected reconnaissance requirements. Examples of IR
include the—
� Location, type, density, and employment method of obstacles in and around the objective.
� Recommended location for the POP.
� Potential breach lanes for attacking units and the level of survivability of the enemy forces on
the objective.
6-14 FM 3-34.22 11 February 2009