Delavi

Delavi was a binary star in the Alpha Quadrant, located near the border of the United Federation of Planets and the Cardassian Union. 

A moon on the third planet of the Delavi system was the site of a covert Cardassian base during the Federation-Cardassian War, which was seized by the USS Gettysburg in 2328. 

The USS Gorkon spent three weeks defending the Delavi system during the Dominion War.