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Table of Contents
The roots of the kavkem organisation Shy͡ilun (a strongly abbreviated prenysh (free/unbound) and yilun (future)) lie in the mythology Hes̈i Akynkulla - the belief that the only way the kavkema can possibly claim a niche for themselves is to fight for the planet they've been stranded on.
Both for the Nayabaru and any kavkema in the know, Shy͡ilun is most notable for being the organisation Evenatra (the mythological Tamas̈elu) is actively affiliated with.
Prevalence
Some number between every third or every fourth kavkem can be said to be affiliated with Shy͡ilun, although the density is traditionally considerably greater on Asheenagiji than anywhere else on the planet. That said, after the Tabraan pushback from A Thread Between The Stars, the density on Tabraan began to exceed that in Asheenagiji.
Structure
Shy͡ilun is organised into shards, each which enjoy relative autonomy and their own name. A shard typically consists of kavkema specialised for several different tasks useful to Shy͡ilun - scouting, attack, sabotage, infiltration and intelligence, theft - but nonetheless as a whole specialises on the one or other topic, so that some shards are considered more proficient in thievery than at the other topics.
@todo Neike has notes about shard structure that should go here.
Effectiveness
On a whole, Shy͡ilun is likely a net gain for the kavkema, on two levels - it does achieve goals and it gives the kavkema hope they would otherwise not have.
That said, it is often true that Shy͡ilun missions over time will average to little more than a zero sum game - they tend to lose as many kavkema to the Nayabaru as they manage to free from them. The actual number might be closer to 1.1 kavkema rescued for every 1 kavkem lost, but it's nothing to write home about, and it only takes one bad day to destroy the statistic for one particular shard of unhappy kavkema.
The greater benefit to the Shy͡ilun missions is that they gain more information over time - every kavkem they rescue can tell them more about the current state of the Nayabaru.