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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.

Next: 3-177: Emplace Weapon Systems

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