завоювати довіру (про розвідку / термін спецслужб)
gain bona fides with
bona fides
time-gain control / gain time control
bona fide military detente
bona fide personnel
gain a foothold
gain altitude
gain booty
gain files
transducer gain
gain decisive results
incremental gain
incremental power gain
gain advantage over the enemy
automatic gain control
sum gain
swept gain
gain viсtory
capitalize one's gain
consolidate a gain
gain a footing
gain by force
gain concealment
gain distance from the enemy
gain information
gain intelligence
gain possession (of)
gain scope for maneuver
gain superiority (over)
gain surprise
gain the (enemy's) rear
gain the upper hand