Narendra

The Narendra system is a star system located near the Federation-Klingon border. The third planet, Narendra III, was the site of a Klingon colony.

In 2152, Captain Jonathan Archer stood trial on Narendra III for plotting against the Klingon Empire. (ENT episode: "Judgment")

In 2344, Romulans launched a surprise attack on Narendra III, destroying the colony, as well as the USS Enterprise-C, which had responded to the distress call. This honorable sacrifice served to save the then-tenuous Federation-Klingon Alliance. (TNG episode: "Yesterday's Enterprise"; TLE novel: ''The Art of the Impossible")

In an alternate timeline, the Enterprise-C disappeared in the midst of this battle, and the deterioration of the Alliance continued until it collapsed. (TNG episode: "Yesterday's Enterprise")

In a different alternate timeline, the Narendra system was occupied by Dominion forces in 2373. (TNG short story: "Gods, Fate, and Fractals")