text: Chapter 5
  5-80. The security force’s combat trains move with the flank guard force. The field trains move with the
  BSB or the nearest brigade.
  5-81. If the security force anticipates being overextended, the commander informs the main body commander
  and recommends one of the following courses of action:
  * Reinforce the flank guard.
  * Reduce the area of operations.
  * Screen a portion of the area and guard the rest.
  5-82. Figures 5-5 and 5-6, figure 5-7, page 5-22, and figure 5-8, page 5-23 demonstrate a moving flank guard
  operation. The scenario highlights the tasks, actions, and considerations in regard to a moving flank guard
  operation.
  Moving Flank Guard Scenario
  The 4th Infantry Division, which consists of a division headquarters, two SBCTs, one ABCT, a combat aviation
  brigade, a sustainment brigade, and a division artillery are conducting an attack against a defending enemy
  brigade. The 3rd ABCT (3/4 Infantry Division) is the division decisive effort with the task to seize
  OBJECTIVE KING. The ABCT commander tasks the organic Cavalry squadron (4-10 CAV) to conduct a
  moving flank guard along PL NEW YORK (LOA) between PL COWBOYS (LD) and PL STEELERS (LOA) to
  enable freedom of maneuver of the 3/4 Infantry Division main body.
  The 4-10 CAV augments with the following additional forces to support the moving flank guard mission: an
  armor company, an air attack and reconnaissance troop, an artillery battery, an air defense platoon, a CBRN
  reconnaissance platoon, and a TUAS platoon. Figure 5-5 depicts the task organization.
  Figure 5-5. 4-10 Cavalry task organization