| Clue | Source | Date |
|---|---|---|
| Type of combat here, warn craft at sea | The Times Quick Cryptic | 08 Oct 2024 |
| In which one digs in fighting the enemy (6,7) | ||
| Front line fighting engagement (6,7) | ||
| Fighting involving excavated shelters | LA Times Daily | 11 May 2019 |
| Fighting involving excavated shelters | The Washington Post | 11 May 2019 |
| Fighting involving excavated shelters | ||
| Much of the fighting, circa 1917 |