From Foxe's Book of Martyrs: "Hermenigildus, a Gothic prince, was the eldest son of Leovigildus, a king of the Goths, in Spain. This prince, who was originally an Arian, became a convert to the orthodox faith, by means of his wife Ingonda. When the king heard that his son had changed his religious sentiments, he stripped him of the command at Seville, where he was governor, and threatened to put him to death unless he renounced the faith he had newly embraced. The prince, in order to prevent the execution of his father's menaces, began to put himself into a posture of defence; and many of the orthodox persuasion in Spain declared for him. The king, exasperated at this act of rebellion, began to punish all the orthodox Christians who could be seized by his troops, and thus a very severe persecution commenced: he likewise marched against his son at the head of a very powerful army. The prince took refuge in Seville, from which he fled, and was at length besieged and taken at Asieta. Loaded with chains, he was sent to Seville, and at the feast of Easter refusing to receive the Eucharist from an Arian bishop, the enraged king ordered his guards to cut the prince to pieces, which they punctually performed, April 13, A.D. 586."
It doesn’t say anything about him fighting back when he was cut to pieces.
Smith is no martyr.