периметр; зовнішній обвід (передній край) кругової оборони
perimeter
perimeter camp
perimeter defense (all-around defense)
perimeter formation
perimeter position
perimeter unit
perimeter weapon
bevel half-perimeter
radar range perimeter
night time perimeter assignment
security perimeter
defensive perimeter post (DPP)
perimeter defense
perimeter guard
pull a unit out of the perimeter
pull back into a tighter perimeter