close theatre maintenance

active layered theatre (ballistic) missile defense (ALTBMD)

inter-theatre

intra-theatre airlift system (ITAS)

logistics preparation of the battlefield / theatre (LPB / LPT)

theatre training

close-quarters combat (CQC) / close-quarters battle (CQB)

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

at close quarters

close air support (CAS)

close air support mission

close approach

close column

close combat

close combat attack (CCA)

close combat optic (CCO)

close defensive fire

close engagement

close envelopment

close observation

close operations

close political-military communication

close support

close support aircraft

close supporting fire

close-in air defense weapon