text: Introduction
  Chapter 16 (Passage of Lines) introduces and describes the general considerations, organization of forces,
  control measures, and the conduct of the variations of a passage of lines No major updates in this chapter.
  Chapter 17 (Countermobility) introduces and describes the general considerations for countermobility,
  terrain reinforcement, obstacle intent, obstacle employment principles, and obstacle emplacement. This is a
  new chapter and makes countermobility an enabling operation.
  Chapter 18 (Mobility) introduces and describes the general considerations of and the types of mobility tasks.
  This is a new chapter and makes mobility an enabling operation.
  Chapter 19 (Tactical Deception) introduces and describes tactical deception principles, types, means, and
  variations. This is a new chapter and makes tactical deception an enabling operation and moves feint
  and demonstration from an offensive operation to a variation of tactical deception.
  Chapter 20 (Linkup) introduces and describes the general considerations and conduct of link up operations.
  This is a new chapter and makes linkup an enabling operation.
  Appendix A (Tactical Control Measures) introduces and describes the general considerations for common
  control measures. The major updates to this appendix include organizing control measures by
  movement and maneuver control measures, fire support coordination measures, and airspace
  coordinating measures.
  Appendix B (Tactical Mission Tasks) introduces, describes, and provides graphical depictions of the
  tactical mission tasks. The major updates in this appendix are removing ambush and defeat as tactical
  mission tasks, alphabetizing the tactical missions, and removing actions by friendly forces and effects
  on enemy forces.
  Appendix C (Encirclements) introduces and describes encirclements and describes types of encirclement.
  The major update to this appendix is modifying the executing an encirclement discussion to include
  two methods.
  This publication is the proponent for select terms. See introductory table-1 for removed terms. See
  introductory table-2 for terms with modified definitions. See introductory table-3 on page xviii for terms with
  a new proponent. See introductory table-4 on page xix for new terms.
  Introductory table-1. Removed terms
  Term Remarks
  administrative movement No longer used as a defined Army term.
  air movements No longer used as an Army term. Adopts joint term.
  contiguous area of operations No longer used as a defined Army term.
  covering force No longer used as a defined Army term.
  covering force area No longer used as a defined Army term.
  decisive engagement No longer used as a defined Army term.
  defeat (tactical mission task) No longer used as a defined Army term.
  encirclement operations No longer used as a defined Army term.
  fire strike No longer used as a defined Army term.
  flank attack No longer used as a defined Army term.
  noncontiguous area of operations No longer used as a defined Army term.
  Introductory table-2. Modified terms and definitions
  Term Remarks
  actions on contact FM 3-90 modifies definition and becomes proponent.
  alternate position FM 3-90 modifies definition and becomes proponent
  ambush FM 3-90 modifies definition.
  approach march FM 3-90 modifies definition and becomes proponent.