First line of defense and Line of defense

Line of defense and first line of defense are semantically related. In some cases you can replace phrase "Line of defense" with "First line of defense", this phrases are similar.

Line of defense noun - Any organization whose responsibility it is to defend against something.

First line of defense and line of defense are semantically related. Sometimes you can replace phrase "First line of defense" with "Line of defense", this phrases are similar.