 He fought at the Battle of Barnet on 14 April 1471, and was with his elder brother, John de Vere, 13th Earl of Oxford, when he seized St. Michael's Mount in Cornwall on 30 September 1473.Sir George Vere was attainted in Parliament in early 1475, together with his brothers, John and Thomas.Ross states that Sir George Vere was never officially pardoned, although Richardson states that his attainder was reversed when King Henry VII came to the throne in 1485.