Kalandra system

From Memory Alpha, the free Star Trek reference

The Kalandra system is a star system in the Kalandra sector. It is known for its frequent ionic storms.

In 2375, during the Dominion War, the Federation Alliance was entrenched in the system and could move no further. In that year, Captain Benjamin Sisko and General Martok expressed their concerns that the ionic storms in the Kalanda system would expose the starships there to the Dominion, necessitating the need to expand the lines beyond it. (DS9: "The Emperor's New Cloak")