text: Chapter 15
  Relief in Place
  This chapter discusses the general considerations of conducting a relief in place. It then
  discusses the organization of forces, control measures, planning, and preparation
  associated with a relief in place. Lastly, this chapter discusses the execution of a relief
  in place.
  GENERAL CONSIDERATIONS OF A RELIEF IN PLACE
  15-1. Units conduct a relief in place as part of a larger operation, primarily to maintain the combat
  effectiveness of committed force. The higher echelon headquarters directs when and where to conduct the
  relief and establishes the appropriate control measures. A relief may serve to free the relieved unit for other
  tasks such as decontamination, reconstitution, routine rest, resupply, maintenance, specialized training,
  resuming offensive operations, or as part of a deception operation. For example, the enemy’s reaction to
  friendly forces conducting a relief may cause it to move reserves from an area where the friendly commander
  wants to conduct a penetration.
  15-2. A relief in place is an operation in which, by direction of higher authority, all or part of a unit is
  replaced in an area by the incoming unit and the responsibilities of the replaced elements for the mission and
  the assigned zone of operations are transferred to the incoming unit (JP 3-07.3). In this operation, the
  responsibilities of the replaced elements for the mission and the assigned area transfer to the incoming unit.
  The three variations of a relief are sequential, simultaneous, or staggered:
  * A sequential relief in place occurs when each element within the relieved unit is relieved in
  succession, from right to left, left to right, front to rear, or rear to front (ADP 3-90).
  * A simultaneous relief in place occurs when all elements are relieved at the same time (ADP 3-90).
  * A staggered relief in place occurs when each element is relieved in a sequence determined by the
  tactical situation, not its geographical orientation (ADP 3-90).
  15-3. Simultaneous relief takes the least time to execute but is more easily detected by enemy forces.
  Sequential or staggered reliefs can occur over a significant amount of time. These three relief techniques can
  occur regardless of the type of operation in which the unit is participating.
  15-4. A relief in place is characterized as either deliberate or hasty, depending on the amount of planning
  and preparations associated with the relief in place. The major differences are the depth and detail of planning
  and, potentially, the execution time. Detailed planning generally facilitates shorter execution time by
  determining exactly what units need to do and the resources needed to accomplish the mission. Deliberate
  planning allows commanders and staffs to identify, develop, and coordinate solutions to potential problems
  before they occur and to ensure the availability of resources when and where needed.
  ORGANIZATION OF FORCES FOR A RELIEF IN PLACE
  15-5. When possible, both units involved in a relief in place should be of similar type—such as Armor
  company or light infantry battalion—and task-organized to help maintain operations security. If not, the
  incoming commander decides on which positions to man, which to not man, and where to establish new
  positions. The incoming unit assumes the same task organization as the outgoing unit but adjusts it based on
  its modified tables of organization and equipment. It assigns responsibilities and deploys in a configuration
  similar to the outgoing unit.
  15-6. The incoming unit establishes advance parties to conduct detailed coordination and preparations for
  the operation, down to the company level and possibly to the platoon level. These advance parties infiltrate