text: Movement to Contact
  Methods of Cordon and Search
  4-72. Units have two methods for conducting a cordon and search: cordon and knock and cordon and enter.
  The primary difference in methods is the level of force required to gain access to the target. In a cordon and
  knock, the search element requests or demands access to the target. In a cordon and enter, the search element
  accesses the target by force. Regardless of the method, search elements must be prepared to escalate force
  appropriately to gain access to the target. Leaders consider the terminal effects of fires and ensure friendly
  location awareness to prevent fratricide and limit collateral damage to the greatest extent possible.
  Control Measures for Cordon and Search
  4-73. Control measures useful for conducting cordon and search include—
  * Assembly area.
  * Line of departure.
  * Checkpoints.
  * Contact points.
  * Objectives.
  * Rally points.
  * Phase lines.
  * Routes.
  * Restricted fire line.
  Planning a Cordon and Search
  4-74. During planning (includes preparation) and reconnaissance, mission analysis is conducted through
  either the MDMP or troop leading procedures process, focusing on the task and purpose, intelligence
  preparation of the battlefield (identification of target and target areas), and tentative scheme of maneuver.
  Detailed direct fire plans serve as risk mitigation measures to prevent fratricide between clearing elements
  and the cordon. Support forces external to the battalion are task-organized and warning orders are issued. As
  planning serves to focus the information collection effort by identifying what to look for and where to look
  for it, reconnaissance helps to refine the planning process by answering through collection, information
  requirements, and priority intelligence requirements. Although the plan is continually updated with
  reconnaissance and surveillance throughout the operation, this phase ends with the unit issuing the completed
  order, conducting final rehearsals and inspections, and crossing the LD.
  Preparing a Cordon and Search
  4-75. The level of rehearsal and extent of participation depend upon the time available and the physical
  location of participants. Rehearsals may be full or reduced force. Multiple rehearsal types and techniques
  may be used in preparation for a mission. For example, confirmation briefs and backbriefs may be required
  following the issuance of an operation order, and a map rehearsal may be conducted via remote
  communications equipment or in person once subordinate elements have completed their plans.
  4-76. Rehearsals should address non-mission-specific tasks and mission-specific execution details and be
  more than a mere discussion of what is supposed to happen. Effective rehearsals test subordinate
  understanding of key activities, including the spatial relationships and timing of key actions; contingencies;
  communication; and purpose, priorities, allocation, and resourcing of support. Leaders normally issue
  rehearsal guidance via published warning orders.
  4-77. Non-mission-specific task rehearsals might include—
  * Battle drills and other standard operating procedures, such as assaulting a building or reacting to
  enemy contact.
  * Breaching obstacles and doorways.
  * Search techniques (such as individual, vehicle, and room).
  * Detainee and captured materiel handling and processing.
  * Tactical callout.