During the Faith Militant uprising, Jon remained loyal to the Iron Throne. He fought in the battle at the Great Fork, under the command of King Maegor I Targaryen. Early in the battle, he was blinded by a sword slash, yet he managed to rally his men and led a charge that broke through the lines of the Faith Militant and put the Poor Fellows to flight. He was later killed by the Warrior's Sons who remained loyal to Ser Joffrey Doggett.
- Fire & Blood, The Sons of the Dragon.