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3-176. The following steps apply in planning and integrating obstacles (see figure 3-22) during defensive missions:
- Determine the obstacle group intent with the engineer platoon leader confirming the target, relative location, and effect. Ensure intent supports the task force scheme of maneuver.
- In conjunction with the engineer platoon leader, identify, site, and mark the obstacles within the obstacle group.
- Integrate protective obstacle types and locations within Infantry platoon defensive perimeter.
- Ensure coverage of all obstacles with direct fires and or indirect fires.
- Assign responsibility for guides and lane closure as required.
- According to METT-TC, assist engineer platoons in emplacing obstacles, securing Class IV/V point, and securing obstacle work sites.
- Coordinate engineer disengagement criteria, actions on contact, and security requirements with the engineer platoon leader at the obstacle work site.

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Go Back To: U.S. Army FM 3-21.8: The Infantry Rifle Platoon and Squad