There was no effort to turn the wagons in a single defensive perimeter.

Form two groups: a defensive perimeter and a team to get the hostages out.

We will land and establish our normal defensive perimeter, then play it by ear.

Set up a defensive perimeter, and we'll move out for home at false dawn.

The two men spent four hours circumnavigating the defensive perimeter.

The initial defensive perimeter would then be left behind and forced to catch up.

We might have to set up a defensive perimeter around the base of it, though.

All objectives were taken and a new, larger defensive perimeter was prepared.

See- here is our present camp, well beyond its defensive perimeter.

You would have deployed your men in a stronger defensive perimeter.