alternatehistory.com

IOTL Vladimir Rasate was captured during the 854 Bulgarian invasion of Serbia but was sent back to Boris I in exchange for peace. This is the very same man who tried to reverse his father's Christianization policy that led to his blinding and the ascension of Simeon as Knyaz of Bulgaria.

But what if Vladimir-Rasate was killed instead of captured in the Bulgarian invasion? How will his early death affect the succession line of Bulgaria if Boris might end up giving the throne to Gavrail? Would Simeon just remain a monk or would Gavrail's reign be just as short as Rasate's IOTL?
Top