авангард, бокова охорона та ар’єргард
flank guard
flank security guard
hold advance / hold (up) advance
advance to the rear
rear, to take in the rear
rear guard
rear-hand guard
rear-sight guard
eye-guard; eye guard
observation and fields of fire, avenues of approach, key and decisive terrain,obstacles, and cover and concealment (OAKOC)
assailable flank
flank fire
flank security
flank security force
flank-turning manoeuvre
go around the flank
left-flank attack
open flank
deep flank
flank out the enemy of a position
unprotected flank
unscreened flank
hit on the flank
flank attack
flank command post
flank spotting
flank extension beyond enveloping force
flank
flank array sonar
advanced flank
withdrawn flank
work out to the flank