Ael Deletham Affair
This is the name given to the series of events in which the ship and crew of the Romulan ship Ael Deletham attacked the USS Boudicca, and an Away Team from the Boudicca, on the planet of Medial IV.
The USS Boudicca was badly damaged when the cloaked vessel attacked her, though she eventually managed to maneuver in close and capture the vessel, as most of the Romulan crew was on the planet of Medial IV.
On the planet, Lieutenant Caladryll Sevant and Ensign T'Sar were abducted from an away team after said away team was attacked by cloaked individuals (later discovered to be Romulan) and tortured. It was discovered the Romulans were mining materials on the planet so they could repair their ship, the Ael Deletham.
The Ael Deletham was later escorted to Starbase 23 and her crew tried for war crimes.