There are a number of known species in the Expeditionary Force Series.
Most species are either clients or patrons to one another, for example the Maxolhx
were originally a client species of the Rindhalu.
We are first introduced the Ruhar a client species of the Jeraptha; they are clients to the Rindhalu.[1]
There have been many other introductions to other species during the course of the Expeditionary Force Series, including the ancient species discovered on Newark,[2] and a speicies from outside the galaxy know as the Outsiders.
The Elders were an ancient race that disappeared from the Milky Way millions of years ago. Skippy the Magnificent believes they ascended to a higher level of existence.
Humans on Earth, Avalon & Jiyayuguan (Club Skippy/Jaguar) currently have no specific patrons or clients, but have achieved alliances with two species to whom they provide support. The humans on Paradise, though not technically clients of the Ruhar, must abide and are subject to Ruhar legal tenets.