The Tau Empire launches many probes towards what the Tau have named the Forbidden Zone, the cluster of star systems beyond the far side of the Damocles Gulf in the Eastern Fringe, although few have ever returned. The strange eddies and unreadable energies that drift in that region doubtlessly damage or reroute a portion of those lost probes, but many more are destroyed by the Farsight Enclaves' orbital defence stations that blockade all entry, save only for their own voidships.