| Clue | Source | Date |
|---|---|---|
| *Civil War volley | LA Times Daily | 08 May 2019 |
| *Civil War volley | The Washington Post | 08 May 2019 |
| *Civil War volley | ||
| Loud part of the "1812 Overture" | ||
| Feature of Tchaikovsky's "1812 Overture" | ||
| Battle barrage | ||
| Feature of Tchaikovsky's "1812 Overture" | ||
| Barrage from big guns |