Rimrunner group
The Rimrunner group, a collection of BFF-1 bulk freighters that operated on behalf of the Alliance to Restore the Republic, met its end when Imperial forces decimated it during their assault on Organarms.
Behind the scenes
Interestingly, the spelling of the group's designation differs; it appears as "Rimmrunner" within Star Wars: TIE Fighter, but as "Rim Runner" in the TIE Fighter Collector's CD-ROM: The Official Strategy Guide.