When was the  Roman politician and general died during who's reign Gaius Nasennius were soldiers?
Nasennia (gens) The gens Nasennia was an obscure plebeian family at Rome. None of the Nasennii held any of the higher offices of the Roman state, and the family is best known from Gaius Nasennius, a soldier in the time of Caesar. Many other Nasennii are known from inscriptions.
Silvanus (praetorian prefect) Silvanus (as Zosimus names him ) or Albanus (according to Zonaras ) was a Roman soldier and probably praetorian prefect during the third century ce who came briefly to the notice of history in the reign of Valerian and his co-Emperor Gallienus. He is generally assumed to have been the commander of the praetorians under Gallienus.