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
far-flank movement
hit on the flank
flank attack
flank command post
flank spotting
flank extension beyond enveloping force
flank
flank array sonar
advanced flank
withdrawn flank