Battle of Narendra III

The Battle of Narendra III was the attack on the Klingon outpost on Narendra III by four Romulan warbirds and the subsequent defense of the outpost by the Federation Ambassador class starship USS Enterprise-C in 2344. Although the ship was lost, the sacrifice had an immense impact on the Klingons who considered it an act of honor. This would lead to a new peace treaty between the two powers and solidified their relations until the early 2370s. (The Next Generation: "Yesterday's Enterprise")