he pronounced himself emperor assuming the name "Thessalicus," most likely a confused reference to Valens Thessalonicus. Later that same year Piso's short revolt was ended when he was killed by Valen's troopers. Valens actions during this same period are also unclear. Sometime during 261 as Piso was on his way to kill him, Valens also claimed the Roman throne. It is not clear if this was done to enhance his standing as he confronted the threat from the east or if the title and position was imposed on him by his soldiers. Regardless, Valens' soldiers sought out and killed the usurper Piso and later assassinated him for reasons unknown. Aftermath Macrianus Major and his son attempted to march their army to confront Gallienus, but were defeated in Thrace in 261 by Aureolus, Gallienus’ Imperial Horsemaster. Macrianus and his son were killed in the battle. According to Joannes Zonaras, their army was encircled by Aureolus and surrendered. Macrianus asked to be killed with his son to avoid being taken captive. Quietus who had remained Roman Mesopotamia was besieged in Emesa in 261 and killed by Odaenathus of Palmyra, a loyal client king of the Romans. Citations References Piso 3rd-century Romans Generals of Gallienus Piso Piso Piso