not under command

do not answer - out

do not answer

separable but not separate

not later than (NLT)

not be able to get (someone) on the comms

almost certainly not

do not

do not enter

do not load

target does not develop

not to sweat something

assigned not joined paper strength

under command of

under command aircraft

under command

foot march under packs

hand-held under-barrel grenade launcher

restricted area (under military jurisdiction)

surveillance, under surveillance

under armor auxiliary power unit (UAAPU)

under arms

under barrel grenade launcher (UBGL)

under canvas

under cover of

under fire

under hatches

Under Secretary of Defense (USD)

Under Secretary of Defense for Acquisition, Technology, and Logistics (USD AT&L)

Under Secretary of Defense for Intelligence USD(I)

under-strength unit

under-vehicle improvised explosive device (UVIED)

nap-of-the-earth (NOE) (ground-hugging / terrain masking / flying under the radar / hedgehopping)