credible first strike capability

first fire mixture / first-fire mixture

right to launch a first strike

first-strike intention

multiple-strike capability

precision strike capability

credible deterrence

credible information

credible intelligence

credible threat

credible indications of activities

have no credible information that

credible manoeuvre defence operations

credible report

first aid facility

first aid kit

first echelon maintenance

first echelon medical equipment maintenance

first hand information

first impression report (FIR) (post exercise)

first lieutenant = (брит.) lieutenant

first light

first responder (emergencies)

first response

first response unit

First Sergeant (1SGT)

first watch

first-aid skills

first-line reserve

individual first-aid kit (IFAK)

first lights

Petty Officer First Class (PO1)

Private First Class (PFC)