| Answer | Crossword Clue |
|---|---|
| NAVY | Our first line of defense. |
| SAILORS | Members of our "First Line of Defense." |
| FORRESTAL | Our first Secretary of Defense. |
| USN | First line of defense. |
| MISSILESILO | Farm's first line of defense? |
| tripwires | A comparatively weak military force employed as a first line of defense, engagement with which will trigger the intervention of strong forces |
