(розм.) спати зі зброєю під рукою
all for one and one for all / one for all and all for one
fire at/on/upon (smb./smth.)
upon completion
achieve an agreed-upon outcome
wreck destruction (upon)
fall upon
fall upon successive prepared positions
lie
lie in ambush
lie low
lie of the ground (the)
lie up
lie in wait
lie prone on someone's forefront
lie prone
lie in ambuscade
one-way UAV / one-way attack UAV (OWA UAV)
throw down one's arms
combined arms force / combined-arms force
commission, to resign one’s commission
complete one's tour
force one's way
hoist / strike one's flag
inch one's way forward
one day’s supply
one-man turret
one-piece
one-piece base
one-shot weapon
one-time report (on status of equipment etc.)
one-time report
one-up