text: Chapter 5
  Figure 5-2. Example control measures for movement from assembly area to attack position
  5-40. Dismounted infantry units move by tactical vehicles to the maximum extent possible prior to the arrival
  of identified dismount points to avoid prematurely exhausting their Soldiers. However, dismounted infantry
  forces should not travel too far forward in tactical vehicles. Enemy forces can detect the noise and other
  battlefield signatures associated with using tactical vehicles at a greater distance than they can detect
  dismounted infantry Soldiers. An enemy force will probably respond to friendly tactical vehicles with direct
  and indirect fire systems. Units weigh the need for security against the time required to conduct a foot march
  and its resulting effects on their Soldiers’ physical stamina.
  5-41. Units move rapidly through their attack positions and across LDs controlled by friendly forces. Units
  use their designated attack positions only as needed. For example, it is a place they refuel before crossing the
  LD to ensure sufficient fuel to reach the objective. Units use attack positions when friendly conditions have
  not yet been set. Units should minimize the time they remain stationary in their attack positions. Generally,
  units should initiate actions to protect themselves and increase their survivability every 10 to 15 minutes.
  This includes such things as deploying local security, deploying camouflage nets, and starting the
  construction of fighting and survivability positions. Units can use quartering parties to assist in occupying
  their attack positions.
  5-42. Commanders may designate points of departure for their attacking units instead of an LD for units
  attacking on foot using infiltration and stealth. Armored and Stryker units normally use gaps or lanes through
  friendly positions to allow them to deploy into movement formations before they cross the LD.
  5-43. Preliminary operations for an attack may include using preparation fire and the relief of units in contact
  by executing a relief in place or a forward passage of lines. The relief of units may be desirable to continue
  the momentum of the attack with fresh troops, change the direction of the attack, exploit a weakness in the
  enemy position with reserves, or initiate an offensive on a stabilized front.
  5-44. Tactical commanders use artillery, mortar, fixed and rotary wing aircraft, electromagnetic warfare, and
  military information support operations to conduct preparation fire. They develop their preparation fire from
  the top down, with bottom-up refinement. Those subordinate units most affected by the effects of these
  preparation fires must strongly emphasize the bottom-up refinement process. Preparation fire can—
  * Destroy enemy forces.
  * Suppress, neutralize, or disrupt high-value or high-payoff targets.