The Fourth Generation
Hyelartians, who have a naturally long lifespan, have been fighting in a Forever War against the Oolu. Nobody knows what started it or why, but it’s still going on. They will also fight others, for territory or resources, if it benefits their goal of defeating Oolu. The vast majority of Hyelartians have a militaristic way of life.
During adolescence, Hyelartians are encouraged to leave homeworld and explore the universe in order to experience stuff, practice their combat skills, live a little, etc. (like a Hyelartian Rumspringa) before returning to homeworld – or an outpost/recruitment terminal/etc – to enlist and dedicate their lives to the war effort.
*Hyelartian names are, typically, inspired by something spelled backwards. “A name isn’t something to be attached to. After enlisting, a Hyelartian is given an identity number for official records. Numbers matter.”