In the MU, the klingon/cardassian alliance kept as slaves all the peoples of the prime universe federation; the vulcans were prized house slaves in these two empires.
Trek lit introduced Memory Omega, an organisation representing Emperor Spock's long-term plan.
'Rise like lions' showed this plan coming to fruition.
During the course of the book, the vulcan slaves dealt a heavy blow to the cardassians by using their telepathy:
Elite cardassian families started killing each other (parents killing their children, spouse killing spouse).
On the cardassian warships, the crews started killing each other, self-destructing the ships or simply setting in collision courses; entire fleets were lost.
In at least one case, a high-level obsidian order scientist killed all her colleagues, sent metagenic bio-weapons to ~a dozen cardassian worlds, then killed herself; of course, in days, the targeted cardasssian worlds were dead.
Damar, previously established as a loyal subordiante of Dukat's, blew Dukat's brain out in plain view of everyone.
All due to vulcan telepathic control.