@felvették a muszlim hitet,
válaszul a kazáriai valláscserére
nézd, itt is megvan kb a dátum:
There is evidence that Bulgaria did have contacts with the Muslim world as well – either directly or through Volga Bulgaria that had adopted Islam at about the same time (863)
https://en.wikipedia.org/wiki/First_Bulgarian_Empire
de hogy ne mondd, h letagadom:
a türkök egyszer eljutottak a fekete tenger partjáig, de Perzsia felől!
és talán egy évtizedig is kitartott
576–77 a Turk general called Bokhan and an Utigur called Anagai captured the Crimean Byzantine town of Panticapaeum and failed at a siege of Chersonesus. This marks the westernmost extent of Turk power.
https://en.wikipedia.org/wiki/Western_Turkic_Khaganate