1162: "Owain [Gwynedd] moved a host to Arwystli, as far as Llandinam. And after they had obtained immense spoil, the men of Arwystli gathered together, about three hundred, along with Hywel ap Ieuaf, their lord, to go after the spoil. And when Owain saw his enemies coming unexpectedly, he urged his men to fight. And the enemies turned to flight, with Owain and his men slaughtering them, so that hardly a third part of them escaped home in flight." Source: Thomas Jones, The Chronicle of the Princes, 1955, p.143.
In 1162 Owain Gwynedd ravaged the lands of Hywel ab Ieuaf as far as Llandinam, defeating him with great slaughter in a pitched battle.
Source: J.E.Lloyd, A History of Wales, vol II, 1912, p.510.
Other sources, as yet unverified, suggest that the battle took place at Llanidloes.
B.A.Malaws, RCAHMW, 19 October 2006.