text: Chapter 1
  main supply route — The route or routes designated within an operational area upon which the bulk of traffic
  flows in support of military operations. (FM 1-02.1) Also called MSR.
  main track — Track that extends through yards and between stations. (ATP 4-14)
  maintenance collection point — A temporary location established within the battalion echelon for the collection
  of equipment needing or undergoing field maintenance. (ATP 4-33)
  major operation — (DOD) 1. A series of tactical actions (battles, engagements, strikes) conducted by combat
  forces, coordinated in time and place, to achieve strategic or operational objectives in an operational area. 2.
  For noncombat operations, a reference to the relative size and scope of a military operation. (JP 3-0)
  managed attribution — (Army/Marine Corps) The use of hardware, software, and techniques to obscure user
  interest in information that is available through the internet. (ATP 2-22.9-1)
  maneuver — (DOD) 4. Employment of forces in the operational area, through movement in combination with
  fires and information, to achieve a position of advantage in respect to the enemy. (JP 3-0) (Army) Movement in
  conjunction with fires. (ADP 3-0)
  maneuver support operations — Integrate the complementary and reinforcing capabilities of mobility,
  countermobility, protection, and sustainment tasks to enhance decisive action. (FM 3-81)
  manned unmanned teaming — The integrated maneuver of Army Aviation rotary wing and unmanned aircraft
  system to conduct movement to contact, attack, reconnaissance, and security tasks. (FM 3-04) Also called
  MUM-T.
  march column — All march serials using the same route for a single movement under control of a single
  commander. (FM 3-90)
  march serial — A subdivision of a march column organized under one commander. (FM 3-90)
  march unit — A subdivision of a march serial. (FM 3-90)
  Marine air command and control system — (DOD) A system that provides the aviation combat element
  commander with the means to command, coordinate, and control all air operations within an assigned sector
  and to coordinate air operations with other Services. (JP 3-09.3) Also called MACCS.
  Marine special operations forces — (DOD) Those Active Component Marine Corps forces designated by the
  Secretary of Defense that are specifically organized, trained, and equipped to conduct and support special
  operations. (JP 3-05) Also called MARSOF.
  Marine tactical air command center — (DOD) The principal United States Marine Corps air command and
  control agency from which air operations and air defense warning functions are directed. (JP 3-09.3) Also
  called Marine TACC.
  maritime domain — (DOD) The oceans, seas, bays, estuaries, islands, coastal areas, and the airspace above
  these, including the littorals. (JP 3-32)
  marking obscuration — Obscuration effects that are employed to mark targets for destruction by lethal fires,
  identify friendly positions and locations, and provide a form of prearranged area of operations
  communications. (ATP 3-11.50)
  marshalling — (DOD) 1. The process by which units participating in an amphibious or airborne operation group
  together or assemble when feasible or move to temporary camps in the vicinity of embarkation points,
  complete preparations for combat, or prepare for loading. (JP 3-36)
  marshalling area — (DOD) A location in the vicinity of a reception terminal or pre-positioned equipment storage
  site where arriving unit personnel, equipment, materiel, and accompanying supplies are reassembled,
  returned to the control of the unit commander, and prepared for onward movement. (JP 3-35)
  mass atrocity response operations — (DOD) Military activities conducted to prevent or halt mass atrocities.
  (JP 3-07.3) Also called MARO.
  mass casualty — (DOD) Any number of human casualties produced across a period of time that exceeds
  available medical support capabilities. (JP 4-02) Also called MASCAL.
  massed fire — (DOD) 1. The fire of the batteries of two or more ships directed against a single target. 2. Fire
  from a number of weapons directed at a single point or small area. (JP 3-02)
  materiel — (DOD) All items necessary to equip, operate, maintain, and support military activities without
  distinction as to its application for administrative or combat purposes. (JP 4-0)
  measure of effectiveness — (DOD) An indicator used to measure a current system state, with change indicated
  by comparing multiple observations over time. (JP 5-0) Also called MOE.
  measure of performance — (DOD) An indicator used to measure a friendly action that is tied to measuring task
  accomplishment. (JP 5-0) Also called MOP.