Battle of Cefn Carnedd was a Roman pitched battle between opposing field armies, fought in Wales in 51. Which side prevailed is not recorded in the surviving sources, and its outcome is not conclusively established in the historical record. The engagement belongs to Roman Britain, the period of conquest and occupation that followed the invasion of AD 43 and the campaigns against the island's native peoples.
The site of Battle of Cefn Carnedd lies on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is sandstone and conglomerate, interbedded.
This page covers Battle of Cefn Carnedd. A full Aubrey report for the area pulls together this battle alongside scheduled monuments and everything else the record holds within a few miles:
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