>>149516960
This.
>Umayyad Gilman
Supported the Abbasid Revolution
>Gilman of the Iranian Intermezzo
Without exception became meddlers and kingmakers
>Mamluks in Egypt
Took over the system so hard that even the Mehmet Ali Dynasty was centered on an Albanian Janissary and modern Egypt is centered on the army
>Qizilbash in Persia
Became enforcers for a cult, then usurped power and installed a boy king as puppet, only stopped because that boy king secretly trained a corps of musketeers to slaughter them at a banquet
>Janissaries
Eventually became a bloated corps of ineffective powerbrokers like the praetorians and so opposed any societal reform that they were purposely goaded to a banquet where the Sultan knew they'd protest so they too could be slaughtered

And that's not even getting into the topic of eunuchs.

Slavery doesn't pay, kids.