The 1909/10 season saw Abertillery win the Monmouthshire League for the third time, losing just a single game during the campaign. The Club decided that the Monmouthsire League was now to small for Abertillery, and decided to leave the competition to challenge larger teams. The season ended with Jim Webb being called to join the British Isles team in South Africa as a replacement. Over the next few seasons, Abertillery continued improving their fixture lists, and on 21 October 1911, beat Llanelli for the very first time. This result, along with a similar upset caused by Pontypool beating Swansea, was described in the "Western Mail" as 'History in the making...'