Raatooras was a Klingon protectorate, an Arin'Sen colony.
In the mid-22nd century, Raatooras was annexed by the Klingons, who offered its inhabitants the benefits of being part of their empire. However, they abandoned the planet once they had stripped it of resources, leaving its people short on food and fuel.
A few years later in 2152, 54 refugees attempted to flee the planet. They were branded as "rebels" and pursued by the Klingon battle cruiser IKS Bortas, under Duras' command. The refugees were helped to freedom by Captain Jonathan Archer and the Enterprise NX-01 (ENT: "Judgment")