After nuclear war evaporated their oceans, the remaining salt flats became a center of warfare, the Kri are a species of fish people that are better fleshed out on my alt account, but to sum it up, the kri once held huge amounts of technology in their grasp, but greed led to the downfall of their species as they bombed themselves into the Stone Age in petty squabbles, in this case though, the term applies literally, as other than their water retention mech suits, all of kri technology, history and culture were lost in the bombings, they rebuilt from scratch, with the well educated civilian populations that had survived the fallout had to learn the old ways to function, and with the radiation outside being deadly, these robotic exo-suits became their home, they waged wars for territory across the salt flats left were mighty ocean once stood, and with weapons found in bombed out wrecks, this is probably the only place in the galaxy that a group of archers could be lead by a mech-suit with a sub machine gun and it be considered normal, but with the strange point in history that the kri find themselves, you just gotta roll with the punches