The Scourge disaster sent angaran civilization into a dark age. Records of their golden era of technological advancement and proliferation through space only survived as oral history, making it difficult to separate truth from legend. Nevertheless, angara believe they had colonized numerous planets across the cluster before the Scourge's devastation left them cut off from each other for centuries.
As isolated angaran worlds gradually rebuilt their technology and redeveloped space programs, the first mission was reestablishing contact with other lost colonies. A few such planets formed the coalition that now fights the kett. The question remains if more angaran worlds are still hidden by the Scourge, awaiting rediscovery. If they do exist, it's impossible to know what stage of development these worlds are at, what help they might offer against the kett, and whether they will accept the Initiative's presence in the Heleus Cluster.