The first line of defence for the trade union movement is you.
You were right, he had another line of defence in place.
For myself I have nothing to offer by way of defence.
He was a key part of their defence during the late 80's and early 90s.
This line of defence is no better than the first.
Richard knew he had put the country into a state of defence.
It might at any rate be a line of defence.
It was to be the last line of defence before the keep itself.
Yet food was one of the best defences against the cold.
The Wall itself never became a complete line of defences.