User blog comment:Hawki/Nova Covert Ops, part 1 - Reflections/@comment-4817-20160612211107

In the Ghost Academy manga (volume 3), we were introduced to a Sons of Korhal (now Dominion) space unit that had fought on Tarsonis at the Fall of Tarsonis. This unit was later ostracized, pretty much because they knew the secrets of the battle, which would hamper communications with everyone else. One wonders what happened to the poor spacemen who tried to retire.

Psi emitters were a secret to both sides. The most loyal Sons of Korhal members stayed with Mengsk (and didn't spread the word) while those who weren't joined Raynor's Raiders (the way Queen of Blades was written, anyway). The biggest outlier was probably Michael Liberty, not exactly a rebel, but he had no proof of the use of psi emitters.