text: Appendix C
  to deceive enemy forces concerning the location and time of the main effort. However, deception attacks
  need not always occur first.
  C-56. The encircled commander organizes and controls the rupture force in the same manner as during an
  attack or movement to contact. Figure C-8 illustrates an example organization of forces for a breakout by an
  encircled division. The rupture force generates overwhelming combat power at the point of penetration and
  rapidly overwhelms enemy positions and expands the penetration. Encircled units unable to generate
  sufficient combat power for both the rupture force and the perimeter defense can thin their defensive
  perimeter in certain areas by using a detachment left in contact in conjunction with a withdrawal before
  executing the attack. They may also shorten the perimeter’s length, which reduces the size of the area
  occupied by the encircled force.
  Figure C-8. Example breakout organization of forces by an encircled division
  C-57. The rupture force applies the breaching fundamentals of suppress, obscure, secure, reduce, and assault
  to ensure its success at the point of penetration. These fundamentals always apply, but their application varies
  based on the prevailing mission variables.
  C-58. The encircled commander orders the rupture force to hold the shoulders of the penetration while the
  follow and assume force moves forward, if enemy forces at the penetration point have roughly the same
  combat power as the rupture force. As depicted in figure C-9 on page C-14, the actions of the follow and
  assume force then become the main effort. The encircled commander may have the rupture force continue
  its attack if enemy forces are not strong. If there are no identified enemy forces beyond the penetration, the
  rupture force may transition to a movement to contact. After the encircled friendly force breaks out, it moves
  toward other friendly forces and links up with them.
  C-59. Initially, the follow and assume force passes through the gap created by the rupture force. This force
  continues to move rapidly from the encircled area toward its final objective. If the follow and assume force
  becomes the encircled unit’s main effort, it cannot allow itself to become bogged down. Preparation fires by
  artillery, Army aviation, close air support, and air interdiction help the follow and assume force in
  maintaining momentum out of the encircled area.
  C-60. Once the breakout attack starts, the rear guard and any deception forces disengage or delay toward the
  area of the rupture. Perimeter forces integrate smoothly into the rear of the breakout column. Once the
  breakout succeeds, the commander shifts priority of fires as required by the mission variables.