| Answer | Crossword Clue |
|---|---|
| SIEGE | Encirclement of a fortification. |
| BASTION | Part of a fortification. |
| CAPONIERE | In fortification, part of a ravelin |
| ESCARP | Steep slope in front of a fortification |
| MOAT | Trench around a fortification |
| REVET | Build a retaining wall, as a fortification. |
