T-Rogoran

The T-Rogoran were a species from the Gamma Quadrant. In the 16th century they conquered the Skrreeans and enslaved them. 

The T-Rogorans would build a fair sized empire through conquest and eventually come to the attention of the Dominion.

In 2370, the T-Rogorans were invaded by the Dominion and conquered, which allowed for the Skrreeans to flee.