Real World article
(written from a Production point of view)

According to a deleted dialogue of Korinas in scene 38 of the Star Trek: Deep Space Nine episode "Defiant", the Dameron system was a star system in the Cardassian Union where a weapons depot was located. In 2371, the USS Defiant attacked the depot after it was stolen by Maquis operatives. It was one of several attacks designed by Thomas Riker to draw Cardassian forces away from the Orias system. (Star Trek: Deep Space Nine Companion - A Series Guide and Script Library, [1])