The Battle of Chester resulted in the death of Selyf Sarffgadau and Cadwal Crysban, the Synod of Chester contributed to starting.
 This led directly to the Battle of Chester, where thelfrith of Northumbria seems to have killed the kings of Powys and (possibly) Gwynedd during an attack on the ecclesiastical community at Bangor-on-Dee. 
 It resulted in the deaths of Welsh leaders Selyf Sarffgadau of Powys and Cadwal Crysban of Rhs. 
