In 7262 and 7263, the Imperial Security Executive suffered a number of leaks of documentation referring to the establishment of a “Sixth Directorate”, including location information on forward operating bases attributed to this Sixth Directorate, and a number of sightings of Intelligence prowlers whose pennant numbers indicated association with this Directorate, and backed up by traffic analysis indicating the existence of this new intelligence organization.

The Sixth Directorate, of course, did not exist. Not, it is to be noted, in the sense that the Fifth Directorate does not exist, but in the sense that it literally did not exist save for the shadow cast by leaked documentation, dressed-up empty prefabs, and altered transponder data.

Its nonexistence, however, and the panic reactions of most of the Worlds’ intelligence agencies, did a marvelous job of distracting everyone from Second Directorate and Admiralty Intelligence operations during the 7265-7269 period of the Republican central government’s final collapse.

(A brief resurgence in Sixth Directorate sightings occurred in 7489 and 7490, which were largely dismissed as an attempt by the Executive to resurrect their old masquerade. In this case, however, ExSec had designated their Primary Working Group for dealing with the Exceedingly Hostile Takeovers the “Sixth Directorate PWG”, allowing them to operate with impunity in the former Magenite sphere of influence while attention was directed conspicuously elsewhere.)

– Imperial State Security, A Declassified History