| Answer | Crossword Clue |
|---|---|
| ODER | River, Germany's new eastern border. |
| ODER | River forming part of Germany's eastern border |
| ELBE | River forming the eastern border of Charlemagne's empire |
| DELAWARE | New Jersey-Pennsylvania border river |
| NIAGARA | Border river of New York. |
| RAMAPO | River across the New York-New Jersey border |
