field maintenance unit

field officer (field-grade officer / senior officer)

combat field pack, field pack

air support field pack, field pack air support, airborne / para (air support) / Pathfinder Bergen

combination field and field-off duty uniform

field maintenance

field maintenance squadron (FMS)

contingency maintenance / special maintenance

depot maintenance (beyond O and I level activities, performed in an industrial-type facility) / D-level maintenance

maintenance checks / routine maintenance, scheduled tasks

maintenance idling (periodic running of engine for maintenance purposes)

organizational maintenance (O-level) (day-to-day work that standard airfield maintenance groups perform in support of airfield operations)

routine maintenance / scheduled tasks, maintenance checks

scheduled tasks / routine maintenance, maintenance checks

special maintenance / contingency maintenance

maintenance unit

care and maintenance unit

battery coolant unit / battery-coolant unit (BCU)

gear reduction unit / gear-reduction unit

position and navigation unit / position navigation unit (PNU)

pinch (a unit) out of a large unit

acoustic field

antiamphibious minefield  (anti-amphibious mine field)

army in the field

command field exercise (CFX)

crisis medicine field demonstration

fast-moving battle (field)

FH70 field howitzer (towed / self-moving)

field ambulance

field and command post exercise

field army

field army signal brigade

Field Artillery (FA)