The Conquered

Summary
From the back cover: When Captain Sisko leads the Defiant on a dangerous mission into the Gamma Quadrant to liberate a conquered world, the Bajoran government insists that Kai Winn, the Federation's longtime nemesis, assume complete control of the space station. Left behind by Sisko, Major Kira expects the worst from the Kai's new regime, but even she is caught by surprise when a fleet of alien warships attack Deep Space Nine!