"In or about 722 the Welsh won two victories in South Wales . . . the other at Garth Maelog, which was probably the place of that name near Llanbister in Radnorshire." (Footnote): "Another possible identification is with Garth Mailwg, near Llantrisant, Glamorganshire; there is, however, some evidence that this is properly Garth Milwg." [nprn 404850]
Source: J.E.Lloyd, A History of Wales, vol I, 1912, p.197.
721: ". . . and the battle of Garthmaelog [took place] . . . and in those battles the Britons prevailed." Source: Thomas Jones, The Chronicle of the Princes, 1955, p.5.
"Battle Field, Banc y Sidi. A field on Lower Cae Faelog, just west of the farm-house. The tradition handed down to the present owner is to the effect that it owes its name to a heavy battle fought here. No object is known to have been recovered from it.
Visited, 15 June, 1911." Source: RCAHMW Radnorshire Inventory, 1913, no.269; latitude and longitude co-ordinates given in the Inventory account provide a National Grid Reference (SO 1058 7411) which places the site several fields away and 340m northwest of the farmhouse.
The Clwyd-Powys Archaeological Trust records suggest two battles in this area, one in 722 (no.1106) and one in 772 (no.1984), but these may both refer to the battle above.
B.A.Malaws, RCAHMW, 06 November 2006.