text: Fire Support in Depth During Large-Scale Combat Operations
  * Fire plans should be simple, most fires will be against targets of opportunity.
  * Main body FA units should be positioned forward to support covering and other security forces.
  * In the offense, FSCMs should be permissive and on-order, well in front of the rapidly moving
  covering force.
  * On order CFLs should be established in conjunction with phase lines, as close as possible to
  friendly troops.
  * FA units must have the mobility equal to that of the supported forces.
  * Execute fires to assist maneuver in moving and disengaging.
  * Suppress and obscure enemy overwatch positions.
  TROOP MOVEMENT
  6-115. Troop movement is the movement of Soldiers and units from one place to another by any available
  means (FM 3-90). Troop movements are made by different methods, such as dismounted and mounted
  marches using organic combat and tactical vehicles; motor transport; and air, rail, and water means in various
  combinations. FS considerations for troop movement are similar to the FS considerations for security
  operations listed above and by applying the FS functions.
  RELIEF IN PLACE
  6-116. A relief in place is an operation in which, by the 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). There are three techniques
  for conducting a relief: sequentially, simultaneously, or staggered. Simultaneous relief takes the least time to
  execute but is more easily detected by the enemy. Sequential or staggered reliefs can occur over a significant
  amount of time. These three relief techniques can occur regardless of the operational theme in which the unit
  is participating see figure 6-6 on page 6-28.
  6-117. A relief does not normally require artillery units to relieve weapon system for weapon system, unless
  the terrain limits the number of firing positions available. Generally, the relieved unit's artillery and other FS
  assets remain in place until all other relieved elements displace and are available to reinforce the fires of the
  relieving unit in case the enemy tries to interfere. If the purpose of the relief is to continue the attack, the FS
  attack/delivery systems of both forces generally remain in place to support the subsequent operation. FS
  considerations during a relief in place include:
  * The relieving unit adopts the FS plan of the unit being relieved.
  * The FS assets of both units support the relief. This maintains FS if the enemy detects the relief and
  tries to exploit the situation.
  * Plan fires to deceive the enemy and expedite the relief.
  * FS attack/delivery systems maintain normal activity patterns. For example, a unit continues to
  expend the same average number of artillery rounds per day during the relief that it expended
  before the initiation of the relief.
  * The commander does not relieve FA units at the same time as the units they support. Relieving
  FA units do not occupy previously used firing positions. Instead, relieving firing units establish
  firing positions near those firing positions of the relieved unit and carefully integrate their fire with
  that of the relieved unit.
  * Occupying firing positions at night or during periods of poor visibility enhances operations
  security.